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Integrals

Question
CBSEENMA12036091

Statement-1: The number of ways of distributing 10 identical balls in 4 distinct boxes such that no box is empty is 9C3
Statement-2: The number of ways of choosing any 3 places from 9 different places is 9C3 .

  • Statement-1 is true, Statement-2 is true; Statement-2 is a correct explanation for Statement-1.

  • Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1. 

  • Statement-1 is true, Statement-2 is false.

  • Statement-1 is false, Statement-2 is true.

Solution

B.

Statement-1 is true, Statement-2 is true; Statement-2 is not a correct explanation for Statement-1. 

Statement - 1 :
B1 + B2 + B3 + B4 = 10 = coefficient of x
10in (x1 + x2 + .....+ x7)4
= coefficient of x6 in (1 - x7)4 (1 - x)-4
= 4+6-1C6 =9C3
Statement -2 :Obviously 9C3

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