If 5 dice are rolled simultaneously, then the number of ways of getting a total of seven of the numbers…
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
12
15
20
25
Solution
The following are the cases when the sum will be
(i) $7=1+1+1+1+3={ }^5 \mathrm{C}_1$ ways $=5$
(ii) $7=1+1+1+2+2={ }^5 \mathrm{C}_2$ ways $=10$
$\therefore$ Total no. of ways $=5+10=15$