Math, asked by lakshanaraj77, 1 month ago

a number is perfect if it is equal to the sum of all its proper divisors (i.e. excluding itself ) we roll two standard 6 sided dice. what is the probability that the product of numbers that appear on the two faces is a perfect number?

a.5/36
b.1/9
c.1/12
d.2/3​

Answers

Answered by nitinop12
1

Answer:

Step-by-step explanation:

Lets check each option one by one  

A. 9 divisor are 1 and 3.  

1+3=4

=9 so not a perfect number.

B. 15 divisors are 1,3, and 5.  

1+3+5=9

=15 so not  a perfect number

C. 21 divisors are 1, 3 and 7.  

1+3+7=11

=21, so not a perfect number.

D. 6 divisors are 1,2 and 3.  

1+2+3=6 It is a perfect number  

So correct answer is option D

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