Question

Please help

the first right answer will DEFFO be marked as the best answer!
its 15 points!!!

Answer 1

P(red) = .3

P(yellow) = .3

75 cubes in the box

Explanation:

The probability has to add to 1

Since the number of red cubes equals the number of yellow cubes the probability has to be the same

.4 + x+x = 1

.4 +2x = 1

2x = 1-.4

2x = .6

Divide by 2

x = .6/2

x = .3

P(red) = .3

P(yellow) = .3

We know that

P(blue) = .4 = number of blue cubes/ total number of cubes

.4 = 30/total

total = 30/.4

total = 75