There are 10 people in an office with 4 different phone lines. if all the lines begin to ring at once, how many groups of 4 people can answer these lines?

210

Step-by-step explanation:

We are given that

Total number of peoples=n=10

Number of different phone lines=r=4

We have to find the number of groups of 4 people can answer 4 lines when all lines begin to ring at once.

Using combination formula

Substitute the values in the given formula

Then , we get number of groups of 4 people can answer 4 lines=

Number o groups of 4 peoples=

Number o groups of 4 peoples=

Hence, 210 groups of 4 peoples can be made and answer these 4 lines.

the terms of a geometric sequence can be found by beginning with the first term and multiplying by the common ratio repeatedly. a recursive formula for a geometric sequence with common ratio r is given by an=ran−1 a n = r a n − 1 for n≥2 n ≥ 2 .

step-by-step explanation:

i would love   to but there is no graph shown

step-by-step explanation:

i am so sorry