1. A single, standard number cube is tossed. What is the probability of getting a 4 or 5 ? a point)
01
1/5
1/2
1/6
1/3
From a barrel of colored marbles, you randomly select 6 blue, 4 yellow, 2 red, 3 green, and 5 purple marbles. Find the experimental probability of randomly selecting a marble that is not yellow.
2/9
4/5
2/3
10/19
10/20 (or 1/2)
The probability of winning a game is 25%. How many times should you expect to win if you play 36 times?
3 times
7 times
9 times
11 times
9 times
A survey showed that 36% of car owners prefer two-door cars, 52% prefer four-door cars, and 12% have no preference. You ask 300 people. How many do you think will prefer the two-door cars?
108 people will prefer two-door cars.
To get this answer, you just multiply the total number of people surveyed (300) by the percentage of car owners who prefer two-door cars (36% or 0.36):
300 x 0.36 = 108
Mary works in a factory that produces 1,000 telephones each day. When 30 telephones were sampled, it was found that 9 were defective. Estimate how many telephones are defective each day.
314 telephones
284 telephones
300 telephones
310 telephones
310 telephones
To get this answer, you can use cross-multiplication with the given proportions:
9 defective phones out of 30 sampled is equivalent to x defective phones out of 1,000 produced each day:
9/30 = x/1000
Simplifying this gives:
x = (9/30) x 1000 = 300
Therefore, an estimated 300 of the 1,000 phones produced each day are defective.
The spinner is divided into equal parts. Use a tree diagram to find the probability that the spinner will land on a consonant the first time and a vowel the second time if the spinner is spun twice
My spinner has 3 parts, N E and U
A:2/3
B:2/9
C:3/4
D:5/9