Staff Selection Commission Sub Inspector Exam
Question : A can complete a work in 8 days and B can complete the same work in 11 days. How many days will they take, if both work together?
Option 1: $4 \frac{12}{17}$
Option 2: $5 \frac{12}{19}$
Option 3: $4 \frac{11}{19}$
Option 4: $4 \frac{12}{19}$
Correct Answer: $4 \frac{12}{19}$
Solution : The rate at which A works is $\frac{1}{8}$ work per day and the rate at which B works is $\frac{1}{11}$ work per day. Together, A and B can do $\frac{1}{8} + \frac{1}{11} = \frac{19}{88}$ work per day. So, the time taken to complete the
Question : The percentage distribution of Anil's expenditures is presented in the given pie chart. If Anil's monthly expenditure is Rs. 65,000, how much money does he spend on Food and Rent?
Option 1: Rs. 24,050
Option 2: Rs. 25,040
Option 3: Rs. 24,500
Option 4: Rs. 25,400
Correct Answer: Rs. 24,050
Solution : Here, it is given that % spent on food = 25% and % spent on rent = 12% As, Anil's expenditure = Rs. 65,000 Anil's expenditure on food = $\frac{25}{100} \times 65000$ = 16,250 Anil's expenditure on rent = $\frac{12}{100} \times 65000$ = 7,800
Question : The average age of 6 members of a family is 25 years. If the youngest member of the family is 15 years old, then what was the average age (in years) of the family at the time of the birth of the youngest member?
Option 1: 9
Option 2: 12
Option 3: 18
Option 4: 24
Correct Answer: 12
Solution : Given that the average age of 6 members of a family is 25 years. ⇒ Sum of the age of 6 members of the family $=25\times6 = 150$ Youngest member of the family = 15 years At the time of the birth of the youngest
Question : Directions: Seven people, A, B, C, D, E, F, and G, are sitting in a straight row, facing north (not necessarily in the same order). Only 2 people sit to the right of D. G is an immediate neighbour of D. Only 3 people sit between A and G. Only 2 people sit between B and C. E is not an immediate neighbour of C. F sits to the immediate right of G. How many people sit between E and D?
Option 1: 0
Option 2: 1
Option 3: 3
Option 4: 2
Correct Answer: 1
Solution : Given: (I) Seven people, A, B, C, D, E, F, and G, are sitting in a straight row, facing north. Only 2 people sit to the right of D. G is an immediate neighbour of D.
(II) Only 3 people sit between A and G.
Question : Directions: Which number will replace the question mark (?) to complete the given series? 55, 75, 100, 135, 190, ?
Option 1: 280
Option 2: 285
Option 3: 295
Option 4: 290
Correct Answer: 285
Solution : Given: 55, 75, 100, 135, 190, ?
Follow the pattern, to obtain the required missing term –
So, 285 is the missing term in the series. Hence, the second option is correct.
Question : Directions: Arrange the given words in the sequence in which they occur in the dictionary. 1. Forecast 2. Forget 3. Foreign 4. Forsook 5. Force
Option 1: 3, 5, 1, 2, 4
Option 2: 5, 1, 3, 2, 4
Option 3: 5, 1, 3, 4, 2
Option 4: 5, 1, 2, 3, 4
Correct Answer: 5, 1, 3, 2, 4
Solution : Given: 1. Forecast 2. Forget 3. Foreign 4. Forsook 5. Force
Step 1: Compare the first three letters of each word. Since the first three letters of each word are the same F, o, and r, move on
Question : Direction: In the following question, some parts of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If the sentence is free from error, select "No Error."
The full moon appearing in the sky, and its silvery light spread across.
(1) The full moon appearing
(2) silvery light spread across.
(3) No Error
(4) in the sky and its
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (1)
Solution : The error lies in the first option.
The sentence describes two events that happened in the past. Here, both clauses must be in the past tense. Thus, "appearing" should be replaced with "appeared", as "spread" is also in the past form of "spread".
Therefore,
Question : Directions: From the given alternatives, select the word which cannot be formed using the letters of the given word. LEGALIZATION
Option 1: ALERT
Option 2: ALLEGATION
Option 3: GALLANT
Option 4: NATAL
Correct Answer: ALERT
Solution : Given: LEGALIZATION
Now, let's compare all the option words with the word LEGALIZATION – First option: ALERT; The letter R in the word ALERT is not present in the word LEGALIZATION. Second option: ALLEGATION; All the letters of ALLEGATION are present in the word LEGALIZATION.
Question : Study the given table and answer the question that follows. Production of masks (in millions) by a company during the first half of 2020
In the case of Activated carbon masks, in which pair of months was the production equal?
Option 1: April and June
Option 2: April and July
Option 3: July and September
Option 4: April and May
Correct Answer: April and June
Solution : From the table, we can see that the production of Activated carbon Masks was equal in April and June, with a production of 250 million masks each month. Hence, the correct answer is 'April and June'.
Question : The percentage marks obtained by 6 students in different subjects are given below. The maximum marks for each subject have been indicated in the table.
P Q R S T U
What are the approximate percentage marks obtained by student T in all subjects together?
Option 1: 65
Option 2: 58
Option 3: 47
Option 4: 52
Correct Answer: 58
Solution : T's marks in Physics = $80×\frac{65}{100}=52$ T's marks in Mathematics = $150×\frac{60}{100}=90$ T's marks in Hindi = $100×\frac{45}{100}=45$ T's marks in Geography = $75×\frac{88}{100}=66$ T's marks in English = $120×\frac{50}{100}=60$ T's marks in History = $50×\frac{42}{100}=21$ T's total marks = 52 + 90 + 45
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