Q. 283.6( 5 Votes )

Two balls are dra

Answer :

given: 2 white, 3 red, 5 green, 4 black

formula:


two balls are drawn one by one, we have to find the probability that they are of different colours


total possible outcomes are 14C2


therefore n(S)= 14C2=91


let E be the event that all balls are of same colour


E= {WW, RR, GG, BB}


n(E)= 2C2+3C2+5C2+4C2=20


probability of occurrence is




Therefore, the probability of non-occurrence of the event (all balls are different) is




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