Using the combination formula, the coach can make 5,005 different groups.
The position does not matter, hence the <em>combination formula</em> is used.
is the number of different combinations of x objects from a set of n elements, given by:
In this problem, 6 students are taken from a set of 15, hence the number of groups is:
More can be learned about the combination formula at brainly.com/question/25821700
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Answer:
a= 40
Step-by-step explanation:
-5a + 7.5a - 25 = 53.2 + 21.8
add like terms on both sides: 2.5a - 25 = 75
add 25 on both sides: 2.5a = 100
divide both sides by 2.5: a = 40
R=19
R + 237 = 256
subtract 237 from both sides