Here are 5 red marbles, 8 blue marbles, and 12 green marbles in a bag.

what is the theoretical probability of randomly drawing a red marble?

Probability of randomly drawing a red marble is

Step-by-step explanation:

Given 5 red marbles, 8 blue marbles, and 12 green marbles in a bag. we have to find the 5 red marbles, 8 blue marbles, and 12 green marbles in a bag.

As Probability of an event  is the chances of an event to occur. It is defined as the favourable outcomes by total number of outcomes.

As no. of red marbles are 5 and

Total number of marbles are 5+8+12=25 marbles.

Hence, probability of randomly drawing a red marble is

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.