If 5 dice are rolled simultaneously, then the number of ways of getting a total of seven of the numbers appear on their faces is

Step-by-step solution

The following are the cases when the sum will be (i) 7=1+1+1+1+3= ^5 C ₁ ways =5 (ii) 7=1+1+1+2+2= ^5 C ₂ ways =10 Total no. of ways =5+10=15