Question

The number of groups formed from 3 books of
physics, 4 books of mathematics and 5 books of
chemistry when each group contains at least one
book of each subject
(A) 3255
(B) 1670
(C) 4820
220 I (D) 1560​

Answer 1

Answer:

b)1670. .. .

I dont now this is right or wrong

Answer 2

Answer:

3255

Step-by-step explanation:

Number of ways of selecting physics books = 2^3 - 1 = 7

Number of ways of selecting chemistry books = 2^5 - 1 = 31

Number of ways of selecting math books = 2^4 - 1 = 15

7*15*31 = 3255