19.) When two unbiased dice are tossed simultaneously, the
numbers that appear on the top surface of the two dice are a
and b.What is the probability that a^b is a perfect square?
(a^b=a to the power of b)
a)1/3
b)2/3
c)23/36
d)11/18
ans:
20.) When two unbiased dice are tossed simultaneously, the
numbers that appear on the top surface of the two dice are a
and b.What is the probability that (a × b) is a perfect square?
a)5/36
b) 2/9
c) 7/36
d) 1/6
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Answer Posted / abhishek
19 d.
for any number of a(1-6) and for b(2,4,6) the resultant a^b will be a perfect square hence probability + for a=4,1 and b=1 =(6C6 * 6C3)/36 +(6C1 * 6C1)/36+1/36=22/36=11/18
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