Question

2. A phone company offers 5 phone plan options: call waiting, call forwarding, voice mail, conferencing, and caller ID. A customer can choose 3 options. The number of ways one can avail the plan options is2. A phone company offers 5 phone plan options: call waiting, call forwarding, voice mail, conferencing, and caller ID. A customer can choose 3 options. The number of ways one can avail the plan options is

Answer 1

it's the problem of combination
simply ur answer is 5C3
i.e 10 ways

Answer 2

Answer:  The required number of ways is 10.

Step-by-step explanation:  Given that a  phone company offers 5 phone plan options: call waiting, call forwarding, voice mail, conferencing, and caller ID. A customer can choose 3 options.

We are to find the number of ways in which one can avail the plan.

We know that

the number of ways in which r things can be chosen from n different things is given by

$^nC_r.$

Therefore, the number of ways in which one can avail the plan is

$^5C_3=\dfrac{5!}{3!(5-30)!}=\dfrac{5\times4\times3!}{3!\times2\times1}=10.$

Thus, the required number of ways is 10.