if n positive terms are multiplied together the probabilities that the last digit are
-
UP 0 DOWN 0 0 2
2 Answers
621) is easy....
one of these numbers have to be even.....
so that probability is 1- (1/2)n
which is true for all a,b,c
now if that product is divisible by 2 but not 5
so that probability is that all numbers not divisible by 5 - numbers among these that are not divisible by 2
= (4/5)n-(4/10)n
last digit zero is (i) - (ii)
all the options a,b,c look the same or am i not seeing something carefully!
