NTSE Stage 2 SAT 2019 Exam Question Paper

Question : 59 of 100

Marks: +1, -0

If two dice are thrown together, the probability that the difference of the numbers appearing on them is a prime number 0 ) - 9

Solution:

Total number of outcomes

=6x6=36

Favourable outcomes

=(1,3)(2,4)(3,1)(4,1)(5,2)

(6,1)(1,4),(2,5)(3,5)(4,2)(5,3)(l’6)(3,6)(4,6)(6,3)(6,4)

=> No. of favourable outcomes =16
∴ Required probability

=16/36=4/9

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