Question

Two dice are rolled simultaneously. Event A : the sum of the digits on the upper faces is the multiple of 5. Then what is n(A)? *

1/6
7
6
1/7​

Answer 1

answn(A)=7

explain :

s={(1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(2,1),(2,2),(2,3),(2,4),(2,5),(2,6),(3,1),(3,2),(3,3),(3,4),(3,5),(3,6),(4,1),(4,2),(4,3),(4,4),(4,5),(4,6),(5,1),(5,2),(5,3),(5,4),(5,5),(5,6),(6,1),(6,2),(6,3),(6,4),(6,5),(6,6)}

n(s)=36

let, A be an event containing sum of the digits on upper face is multiple of 5

n(A)=7