To order a class ring, students must decide on a gold, silver, or white gold band and one of 15 stones. they must also choose from one of 30 activity symbols to put on the side. how many different ring selections are there?

There are 1,350 different ring selections.

Step-by-step explanation:

Given : The number of metals used for rings (gold, silver, or white gold ) =3

The number of stones they have = 15

The number of activity symbols = 30

By using the fundamental principal of counting , we have the total number of different ring selections as :-

Therefore, there are 1,350 different ring selections.

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation: