Top 100+ Average Aptitude Questions and Answers - 2

Question: 6

The average weight of a class of 24 students is 35 kg. if the weight of the teacher be included, the average rises by 400 g. The weight of the teacher is

(A) 40 kg

(B) 45 kg

(D) 53 kg

View Answer

Ans: B

Weight of the teacher = (35.4 x 25 – 35 x 24) kg = 45 kg.

Question: 7

The average marks in Science subject of a class of 20 students is 68. If the marks of two students were misread as 48 and 65 instead of the actual marks 72 and 61 respectively, what would be the correct average?

(A) 63

(B) 66

(D) 69

View Answer

Ans: D

Correct sum = (68 x 20 + 72 + 61 – 48 – 65) = 1380.

∴ Correct average = $$({1380} / {20})$$ = 69.

Question: 8

A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is

(A) 255

(B) 270

(D) 290

View Answer

Ans: C

Since the month begins with a Sunday.

So, there will be five Sundays in the month.

∴ Required average = $$({510 × 5 + 240 × 25} / {30})$$ = $${8550} / {30}$$ = 285.

Question: 9

The average sale of a car dealership was 15 cars per week. After a promotional scheme the average sale increased to 21 cars per week. The percentage increase in the sale of cars was

(A) 36.33%

(B) 39.33%

(D) 50%

View Answer

Ans: C

Number of cars sold per week originally = 15 × 7 = 105.

Number of cars sold per week under scheme = 21 × 7 = 147.

Increase in sale = 147 – 105 = 42.

∴ Percentage increase = $$({42 / 105} × 100)%$$ = 40%.

Question: 10

The average of the first five multiple of 3 is

(A) 3

(B) 6

(D) 12

View Answer

Ans: C

Average = $${3(1 + 2 + 3 + 4 + 5)} / {5})$$ = $${45} / {5}$$ = 9.

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Top 100+ Average Aptitude Questions and Answers - 2

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