WorksheetsPROBABILITY
Total questions: 14
Worksheet time: 27mins
An unprepared student takes a 3-question true/false quiz in which he guesses the answers to all 3 questions. What is the probability he gets all 3 correct?
1/2
1/3
1/6
1/8
You give the answer to a probability problem as 6/5. The teacher marks it wrong. Why?
It should have been 5/6.
Its not written as a percent.
Its more than 1.
Its not written as a decimal.
Three events occur with probabilities P(E1) = 0.35, P(E2) = 0.15, P(E3) = 0.40. If the event B occurs, the probability becomes P(E1|B) = 0.25, P(B) = 0.30. Calculate P(E1 or B).
0.075
0.575
0.021
0.475
Draw one card from a standard deck. Find P(4 or club)
17/52
2/13
4/13
1/26
Roll a die one time. Find P(a number greater than 3 or odd).
0
1/2
5/6
1/6
Draw one card from a standard deck. Find P(black and a 10)
17/52
2/13
4/13
1/26
Rolling a pair of dice, find P(sum is 5).
11%
25%
17%
22%
There are 10 women and 40 men at a political rally. 25 of the people are Democrats, 20 are Republicans, and 5 are Independent. What is the probability of choosing a person at random and picking a female who is a Democrat?
1/10
7/10
1/2
3/4
What is the probability that a female is chosen given they like a Toyota?
