Maths Maths Puzzle Numerical Ability Permutation and Combination

How many Ways are there to distribute 15 distinct objects into 5 distinct boxes with
a. at least three empty boxes
b. No Empty box

Read Solution (Total 2)

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8 years agoHelpfull: Yes(0) No(3)

(i) At least three empty box.

C(5,3) X P(15,2)X213 + C(5,4) X P(15,1)X114 + C(5,5) X P(15,0)X015

(ii) No empty box.

C(15,5) x 55 x5!
6 years agoHelpfull: Yes(0) No(0)

Maths Other Question

There are two mutually exclusive events A and B with P(A) = 0.5 and P(B)=0.4 . Find the Probability of following
a. A does not occur
b. Both A and B does not occur
c. Either A or B does not occur 105,85,60,30,0,-30,-60