Gate Exam

We have to select 2 numbers from 1 to 9. Probability that the product of these 2 numbers is 12, will be

Read Solution (Total 3)

favours=(2,6),(3,4),(4,3),(6,2)=4
space=10c2=45
so p=4/45
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possibilities:(2,6),(6,2),(3,4),(4,3)
total probability: 2 from 10=10c2
hence ans=4/10c2
11 years agoHelpfull: Yes(1) No(0)
possibilities:(2,6),(6,2),(3,4),(4,3)
total probability: 2 from 9=9c2
hence ans=4/9c2
11 years agoHelpfull: Yes(0) No(0)

Gate Other Question

show that the family of parabolas y2=4a(x+a) is self orthogonal. total no.of methods to divide 52 cards in 4 groups are x. what will be the value of x ?