1> a bag contains 7 red 6 green and 7 white marbles, all identical but for color. what is the probability of selecting a red marble at random?

2> A weather predicts that there is a 45% chance of snow. what is the probability that it will not snow?

3> the probability the sun sets in the west is

a 0
b -1
c 1
d 1/2

i need help

1. a 7/20 chance... in percent, 35 % chance

2. 55 %? :S But that sounds almost too easy...

3. I think it does always set in the west, if that's true, the answer is C - 1.

thanks u

1> To find the probability of selecting a red marble at random, we need to determine the total number of marbles and the number of red marbles.

In this case, the bag contains a total of 7 red marbles, 6 green marbles, and 7 white marbles.

The probability of selecting a red marble at random can be calculated by dividing the number of red marbles by the total number of marbles in the bag:

Probability of selecting a red marble = Number of red marbles / Total number of marbles
= 7 / (7 + 6 + 7)
= 7 / 20
= 0.35 or 35%

2> To find the probability that it will not snow, we need to subtract the probability of snow from 1.

If there is a 45% chance of snow, then the probability of no snow can be calculated as follows:

Probability of no snow = 1 - Probability of snow
= 1 - 0.45
= 0.55 or 55%

3> The probability of the sun setting in the west is always 1 (option c).

The sun consistently sets in the west due to the rotation of the Earth. Therefore, the probability of the sun setting in the west is certain and can be represented as 1, which is equivalent to 100%.