Answer to Question #255087 in Statistics and Probability for Joana may

Question

1. There is a bag full of colored balls, red, blue, green and orange. Balls are picked out and replaced. John did this 1000 times and obtained the following results: WEEK 8 ACTIVITY • Number of blue balls picked out: 300 • Number of red balls: 200 • Number of green balls: 450  • Number of orange balls: 50 a) What is the probability of picking a green ball? b) What is the probability of picking an orange ball? c) What is the probability of getting a non-red ball?

Answer 1

QUESTION

1. There is a bag full of colored balls, red, blue, green and orange. Balls are picked out and replaced. John did this 1000 times and obtained the following results: WEEK 8 ACTIVITY • Number of blue balls picked out: 300 • Number of red balls: 200 • Number of green balls: 450  • Number of orange balls: 50 a) What is the probability of picking a green ball? b) What is the probability of picking an orange ball? c) What is the probability of getting a non-red ball?

ANSWER

Question

a) What is the probability of picking a green ball?

Answer

The total number of picks = 1000

The total number of green balls = 450

$P={450 \over 1000} ={45 \over 100}={9 \over 20}=0.45$

Question

b) What is the probability of picking an orange ball?

Answer

The total number of picks = 1000

The total number of orange balls = 50

$P={50 \over 1000}={1 \over 20}=0.05$

Question

c) What is the probability of getting a non-red ball?

Answer

The probability of picking non-red ball = 1 - the probability of picking red ball

$P=1- {200 \over 1000}=1-{1 \over 5}={4 \over 5}=0.8$