RSM wants to send four of its 18 Math Challenge teachers to a conference. How many combinations of four teachers include exactly
one of either Mrs. Vera or Mr. Jan?
1 answer:
Answer:
1120 combinations of four teachers include exactly one of either Mrs. Vera or Mr. Jan.
Step-by-step explanation:
The order in which the teachers are chosen is not important, which means that the combinations formula is used to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.
In this question:
1 from a set of 2(Either Mrs. Vera or Mr. Jan).
3 from a set of 18 - 2 = 16. So

1120 combinations of four teachers include exactly one of either Mrs. Vera or Mr. Jan.
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Step-by-step explanation:
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Answer:
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Step-by-step explanation:
Step 1:
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Hope This Helps :)
We could write the fractions as decimals.

The answer is
.004 or 4/1000.