Question

Ping is deciding what to choose for dinner from the menu. He can choose 1 of 3 pasta meals, 1 of 7 chicken meals, or 1 of 3 fish meals.
How many ways can ping choose a dinner meal?
13
30
3
63

Answer 1

Given:
1 of 3 pasta meals
1 of 7 chicken meals
1 of 3 fish meals

Simply multiply the total number of choices: 

3 x 7 x 3 = 63

Ping can choose a dinner meal in 63 ways.

Answer 2

Answer:

The correct option is 4.

Step-by-step explanation:

The possible ways of selecting r items from n items is defined as

$^nC_r=\frac{n!}{r!(n-r)!}$

Ping can choose 1 of 3 pasta meals, 1 of 7 chicken meals, or 1 of 3 fish meals. The number of ways ping can choose a dinner meal is

$^3C_1\times ^7C_1\times ^3C_1=3\times 7\times 3=63$

Therefore the number of ways ping can choose a dinner meal is 63.

Thus correct option is 4.