Question 422857

no. of ways to select 2 scoops of ice cream =
 
no. of ways when both have same flavour + no. of ways when both have different flavours

= 16C1 + 16C2 

= 16 + 120

= 136

no. of ways to topping = 4C1 = 4


total no. of possible sundaes = 136 * 4

= 544


i hope u get it now..