1000+ Ethiopian Banks Aptitude Exam Questions - 1

Question: 1

The average weight of 3 person is 65 kg. If a fourth person having a weight of 45 kg joins the group, what is the average weight of the group?

(A) 60 kg

(B) 61 kg

(C) 63 kg

(D) 65 kg

Ans: A

Average weight of 3 persons = 65 kg

Weight of 4th person = 45 kg

Average weight of new group = $${65 × 3 + 45 × 1} / {4}$$ = $${195 + 45} / {4}$$ = $${240} / {4}$$ = 60 kg.

Question: 2

In the first 10 over’s of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 over’s to reach the target of 282 runs?

(A) 6

(B) 6.25

(C) 6.75

(D) 7

Ans: B

Score in the first 10 overs = 3.2 × 10 = 32

To achieve a target of 282 runs

Balance runs required = 282 - 32 = 250

Balance overs available = 40

∴ Required run rate = $${250} / {40}$$ = 6.25

Question: 3

The average age of a committee of 8 members is 40 years. A member, aged 55 years, retired and e was replaced by a member aged 39 years. The average age of the present committee is

(A) 38 years

(B) 39 years

(C) 40 years

(D) 41 years

Ans: A

New average of the committee (in years)

= $${8 × 40 - 55 + 39)} /{8}$$ = $${320 - 16} /{8}$$ = $${304}/{8}$$ = 38 years.

Question: 4

A batsman has a certain average of runs for 12 innings. In the 13th innings, he scores 96 runs and thereby increasing his average by 5 runs. What is his average after the 13th innings?

(A) 36

(B) 48

(C) 64

(D) 72

Ans: A

To improve his average by 5 runs per innings
he has to contribute 12 x 5 = 60 runs for the previous 12 innings.

Thus, the average after the 13th innings = 96 - 60 = 36.

Question: 5

The average height of the student of a class of 20 is 105 cm. If ten more students of average height of 120 cm join this class, the average height of the class will become

(A) 110 cm

(B) 112.5 cm

(C) 115 cm

(D) 117.5 cm

Ans: A

Average height of 20 students in a class = 105 cm.

After joining 10 students of average height 120 cm, average height of students of the class

= $${20 × 105 + 10 × 120} / {30}$$ = 2 × 35 + 10 × 4 = 70 + 40 = 110 cm.

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