Probability And Operator

Given the following probabilities, which event is most likely to occur?

• P(A) = 0.28

• P(B) = 1/4

• P(C) = 0.27

• P(D) = 2/9

The odds of Macy passing her driver’s test on the first try are 7 : 4. Determine the odds against Macy passing her driver’s test.

• 4 : 7

• 4 : 11

• 7 : 11

• 3 : 11

Raymond has 12 coins in his pocket, and 9 of these coins are quarters. He reaches into his pocket and pulls out a coin at random. Determine the odds against the coin being a quarter.

• 1 : 4

• 1 : 3

• 3 : 4

• 3 : 1

Tia notices that yogurt is on sale at a local grocery store. The last eight times that yogurt was on sale, it was available only three times. Determine the odds against yogurt being available this time.

• 3 : 5

• 3 : 8

• 5 : 8

• 5 : 3

The odds of Macy passing her driver’s test on the first try are 7 : 4. Determine the probability that she will pass her driver’s test.

• 0.226

• 0.364

• 0.571

• 0.636

Julie draws a card at random from a standard deck of 52 playing cards. Determine the probability of the card being a diamond.

• 0.250

• 0.500

• 0.625

• 0.750

The weather forecaster says that there is an 80% probability of rain tomorrow. Determine the odds against rain

• 4 : 5

• 4 : 1

• 1 : 5

• 1 : 4

From a committee of 18 people, 2 of these people are randomly chosen to be president and secretary. Determine the number of ways in which these 2 people can be chosen for president and secretary if one person cannot occupy both positions.

• 35

• ₃₆

• ₃₂₄

• ₃₀₆

Nine boys and twelve girls have signed up for a trip. Only six students will be selected to go on the trip. Determine the probability that only boys will be on the trip.

• 0.02%

• 0.08%

• 0.15%

• 0.23%

Cai tosses four coins. Determine the probability that they are all tails.

• 6.25%

• 12.50%

• 18.75%

• 25.00%