distribution of the number of books sold in five different shops.

1) The ratio of the number of science and history books sold in B is 5:3. Find the number of science books sold in B, if only science and history books sold in B?

A.640

B.660

C.620

D.600

E.680

2) The number of books sold in F is 40% more than that of D. If the ratio of the number of books sold to unsold in F and A is 7:5 and 9:4 respectively, then find the difference between the number of unsold books in F and A?

A.556

B.572

C.576

D.564

E.560

3) What is the ratio of the number of books sold in C and E together to the number of books sold in A and B together?

A.1:1

B.2:1

C.1:2

D.3:2

E.None of these

4) The number of science books sold in E is 45% of the total number of books sold in the same shop and the ratio of the number of science and English books sold in C is 7:8. Find the total number of science books sold in E and C, if only science and English books sold in E and C?

A.872

B.874

C.878

D.876

E.892

5) Find the average number of books sold in A, D and E together?

A.1008

B.1004

C.1010

D.1012

E.1016

Answers :

1) Answer: B

Required total = 5/8 * 22/100 * 4800 = 660

2) Answer: C

Number of unsold books in F = 140/100 * 20/100 * 4800 * 5/7 = 960

Number of unsold books in A = 4/9 * 18/100 * 4800 = 384

Difference = 960 – 384 = 576

3) Answer: A

Required ratio = (15 + 25):(18 + 22)= 40:40 = 1:1

4) Answer: D

Required total = 45/100*25/100*4800 + 7/15*15/100*4800= 540+336= 876

5) Answer: A

Required average = (18 + 20 + 25)/300 * 4800 = 1008