CPM Homework Help : CCA2 Problem 10-127

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10-127.

Find the value of each of the following combinations.

$_{10}C_8$
Hint (a):
Look at the Math Notes box from Lesson 10.1.1 to review this type of calculation.

$_{12}C_7$
Step (b):
$\frac{12!}{(12-7)}!7!$

$_7C_1$
Answer (c):
$7$

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