1. a bag has 5 red marbles, 6 blue marbles and 4 black marbles. what is the probability of picking a red marble, replacing it, and then picking another red marble?

2. a bag has 5 red marbles, 6 blue marbles and 4 black marbles. what is the probability of picking a
blue marble, replacing it, and then picking a black marble?

3. a bag contains 4 white marbles, 3 black marbles, and 5 red marbles. find the probability of picking a red marble?

4. a bag contains 3 white marbles, 2 black marbles, and 5 red marbles. find the probability of picking a white marble

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Step-by-step explanation:

(1). A bag has 5 red marbles, 6 blue marbles and 4 black marbles.

Total marbles in a bag = 5 + 6 + 4 = 15 marbles

The probability of picking a red marble = =

By replacing it and then picking another red marble  = =

P = × =

(2). A bag has 5 red marbles, 6 blue marbles and 4 black marbles.

Total marbles in a bag = 5 + 6 + 4 = 15 marbles.

The probability of picking a blue marble =   = =  

replacing it and then picking a black marble =   =  

P =   ×   =  

(3). A bag contains 4 white, 3 black and 5 red marbles.

Total marbles = 4 + 3 + 5 = 12 marbles

The probability of picking a red marble =  

(4). A bag contains 3 white marbles, 2 black marbles and 5 red marbles.

Total marbles = 3 + 2 + 5 = 10 marbles.

The probability of picking a white marble =  

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(2)

(3)

(4)

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