EL Math Problems/ Probabilty
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- From a group of 2 boys and 4 girls, a boy and a girl will be selected to attend a conference. In how many possible ways can a boy and a girl be picked?
- 8
- 5 out of every 50 radios are defective. How many will be defective out of 300 radios?
- 30
- Account numbers for an oil company consists of 5 digits. If the 1st digit isn't a zero, how many account numbers are possible?
- 90,000
- 4 coins will be tossed at the same time. What is the probability that half of the coins will be heads and half will be tails?
- 3/8
- A number is drawn at random from the 1st fifty counting numbers. What is the probability that the number is even and divisible by three?
- 4/25
- You and 6 other people are on a softball team. How many ways can 2 captains be selected for the team?
- 21
- You are purchasing 2 cds from a collection of blues, rock, jazz, classical, and show tunes. If your choices are from 2 different music catagories, how many different ways can you buy 2 cds?
- 10
- How many ways can you arrange 5 different scoops of ice cream on a cone?
- 120
- A number cube is tossed. If the number is odd, I get that number of points. If the number is even, you get that number of points. Find the expected value for a turn for each of us.
- One and a half - Two
- How many ways can 3 even numbers be picked from the numbers 1-10?
- 10 ways
- A coin is tossed. If a head appears, a spinner can land on one of the numbers one through five. If a tail appears, then the coin is tossed a second time instead. What are the possible outcomes?
- 7
- You and 6 friends play a game where each person writes their name and the names are randomly distributed back to the them. What is the probability that EVERYONE gets their own name back?
- 1/5,040
- On a team of 21 people, you and your friends play basketball.What is the probability that you and one of your friends are picked to be the two captains?
- 2/21
- A spinner that has five sections of equal area, numbered one through five, is spun two times in succession. How many possible outcomes are there?
- 25