In a bowling game you have 2 chances to knock down the 10 pins. How many different ways can the pins be knocked down if with every 2 tries all 10 pins are knocked down

9 ways

Step-by-step explanation:

Let's begin by listing all possible options. Let a equal the number of pins knocked down on the first try and b equal the number of pins knocked down on the second try.

a = 9, b = 1 a = 8, b = 2 a = 7, b = 3 a = 6, b = 4 a = 5, b = 5 a = 4, b = 6 a = 3, b = 7 a = 2, b = 8 a = 1, b = 9

Assuming that a and b cannot equal 0 (that is, 0 pins knocked down on one try and 10 knocked down on the other), there are 9 possible combinations.