A.63 kg

B.48 kg

C.32 kg

D.55 kg

E.None of these

2) Average weight of A, B and C is 44 kg. If the average weight of A, B and C is 10% more than the average weight of A, B, C, D and E, then find the weight of D and E together?

A.68 kg

B.48 kg

C.56 kg

D.72 kg

E.None of these

3) Ratio of the height of A and B is 9:7 and the height of C is 66.67% of the height of A. If the difference between the height of B and C is 21 cm, then find the average height of A and B together?

A.136 cm

B.124 cm

C.145 cm

D.168 cm

E.None of these

4) If the weight of A is 8 kg more than that of B and the weight of C is 12 kg more than that of D and the weight of D is 12 kg more than that of B. If the weight of D is 60 kg, then find the average weight of B, C and D together?

A.72 kg

B.56 kg

C.60 kg

D.48 kg

E.None of these

5) The weight of A is 28.56% less than that of B and the weight of C is 25% more than that of B. If the average weight of A, B and C is 83 kg, then find the average weight of A and B together?

A.63 kg

B.84 kg

C.45 kg

D.72 kg

E.None of these

Answers :

1) Answer: D

Weight of third lightest person=x

51*5=52*2+48*2+x

255-200=x

x=55 kg

2) Answer: A

The average weight of A, B and C=44 kg

The average weight of A, B, C, D and E=44*100/110=40 kg

The weight of D and E=40*5-44*3=68 kg

3) Answer: D

A = 9x

B = 7x

C = 9x *2/3 = 6x

7x - 6x = 21

x= 21 cm

A = 9 * 21 = 189 cm

B = 7 * 21 = 147 cm

Required average=(189 + 147)/2 = 336/2 = 168 cm

4) Answer: C

D = 60 kg

B = 60-12 = 48 kg

A = 48 + 8 = 56 kg

C = 60 + 12 = 72 kg

Required average=(60 + 48 + 72)/3 = 180/3 = 60 kg

5) Answer: D

Let the weight of B=14x kg

The weight of A=14x*5/7=10x kg

The weight of C=14x*125/100=17.5x kg

14x+10x+17.5x=83*3

41.5x=249

x=6

The weight of A=10*6=60 kg

The weight of B=14*6=84 kg

Required average=(60+84)/2=72 kg