1000+ RHB Bank Berhad Aptitude Test Questions and Answers - 1

Question: 1

The average weight if 10 boys is more than the average weight of 15 girls by 5 kg. If the total weight of the 10 boys is 550, what is the average weight of the 10 boys and 115 girls together?

(A) 50 kg

(B) 52 kg

(C) 54 kg

(D) 54.5 kg

Ans: B

Average weight of 10 boys = $${550}/{10}$$ = 55 kg

Average weight of 15 girls = 55 - 5 = 50 kg

∴ Average weight of 10 boys and 15 girls

= $${10 × 15 + 15 × 50} / {25}$$ = 52 kg.

Question: 2

A mathematics teacher tabulated the marks secured by 35 students of 8th class. The average of their marks was 72. If the marks secured by Reema was written as 36 instead of 86 then find the correct average marks up to two decimal places.

(A) 73.41

(B) 73.43

(C) 73.47

(D) 73.49

Ans: B

Correct average = $${35 × 72 + (86 - 36)} / {35}$$

= 72 + 1.43

= 73.43.

Question: 3

The average of 8 men is increased by 2 years when 2 of them whose ages are 21 and 23 years are replaced by two new men. The average age of two new men is

(A) 22 years

(B) 24 years

(C) 30 years

(D) 31 years

Ans: C

When 2 new men are replaced, average age is increased by 2 years.

∴ Increase in the total age of 8 men = 8 × 2 = 16 years.

∴ Total age of 2 new men = 16 + 44 = 60 years.

∴ Average age of 2 new men = $${60} / {2}$$ = 30 years.

Question: 4

The average age of the family of 5 members is 24. If the resent age of youngest member is 8 years then what was the average age of the family at the time of the birth of the youngest member?

(A) 16 years

(B) 18 years

(C) 20 years

(D) 22 years

Ans: A

Total age of the family of five members

= 24 × 5 = 120

Total age of the family of 5 members before 8 years

= 120 - 5 × 8

= 120 - 40 = 80.

So, the required average age = $${80}/{5}$$ = 16 years.

Question: 5

There are two groups A and B of a class, consisting of 43 and 28 students, respectively. If the average weight of group A is 25 kg and that of group B is 40 kg, find the average weight of the whole class.

(A) 31

(B) 69

(C) 70

(D) 79

Ans: A

Required average weight = $${42 × 25 + 28 × 40} / {42 + 28}$$

= $${1025 + 1120} / {70}$$ = $${2170} / {70}$$ = 31 kg.

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