you choose a marble at random from a bag containing 15 red marbles, 7 yellow marbles, and 3 pink marble. you replace the marble and then choose again. find the probability of P(both red)

9/25

Step-by-step explanation:

15 red marbles, 7 yellow marbles, and 3 pink marble = 25 marbles

1st marble red

P(red) = red/total = 15/25 = 3/5

replace

15 red marbles, 7 yellow marbles, and 3 pink marble = 25 marbles

2nd marble red

P(red) = red/total = 15/25 = 3/5

P(red, replace,red) = P(red) * P(red) = 3/5 * 3/5 = 9/25

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2