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1. A bag contains 15 red balls and 6 blue balls. Find the probability of picking at random a blue ball from the bag.
2. A bag contains 6 white and 8 red balls. What is the probability that a ball picked at random will be a white ball ?
3. There are 12 red and 8 blue balls in a bag. If a ball is selected at random from the bag, what is the probability that it is
red ?
4. A bag contains 4 blue and 8 red balls. What is the probability of picking a blue ball at random from the bag?
5. A bag contains 6 blue and 5 black balls. Wihat is the probability of picking a black ball at random?​

Respuesta :

ZJSG09112007

Answer:

  • 2/7
  • 3/7
  • 3/5
  • 1/3
  • 5/11
  • I Hope it helps

Step-by-step explanation:

[tex]probability \: = \\ \frac{event}{total \: no \: of \: possible \: outcome} \\ [/tex]

[tex]15 \: red \: balls \\ 6 \: blue \: balls \\ probability \: = \\ \frac{event}{total \: no \: of \: possible \: outcome} [/tex]

1.

[tex]6 + 15 = 21 \\ p \: = \frac{6}{21} \\ p \: = \frac{2}{7} \\ [/tex]

2.

[tex]6 \: white \: balls \\ 8 \: red \: balls. \\ 6 + 8 = 14\\ p \: = \frac{6}{14} = \frac{3}{7} [/tex]

3.

[tex]12 \: red \: balls \\ 8\: blue \: balls \\ 12 + 8 = 20\\ p = \frac{12}{20} = \frac{3}{5} [/tex]

4.

[tex]4 \: blue \: balls \\ 8 \: red \: balls \\ 4 + 8 = 12\\ p \: = \frac{4}{12} = \frac{1}{3} [/tex]

5.

[tex]6 \: blue \: balls\\ 5 \: black \: balls. \\ p \: = \frac{5}{11} [/tex]

Answer:

1. 6/21

2. 6/14

3. 12/20

4. 4/12

5. 5/11

Step-by-step explanation:

color of ball your looking for/Total amount of balls

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