Mastering Probability Calculations

What is the probability of rolling a sum of 7 with two dice?

• 1/6

• 1/4

• 1/12

• 1/8

If a bag contains 3 red balls and 2 blue balls, what is the probability of drawing a red ball?

• 4/5

• 2/5

• 3/5

• 1/2

A card is drawn from a standard deck of 52 cards. What is the probability of drawing a heart?

• 1/3

• 1/5

• 1/2

• 1/4

In a class of 30 students, 18 are girls. What is the probability of randomly selecting a boy?

• 0.3

• 0.6

• 0.5

• 0.4

If you flip a coin three times, what is the probability of getting exactly two heads?

• 0.25

• 0.375

• 0.5

• 0.625

A box contains 5 white and 3 black marbles. What is the probability of picking a black marble?

• 1/2

• 3/8

• 2/8

• 4/8

What is the probability of rolling an even number on a six-sided die?

• 1/2

• 3/6

• 2/3

• 1/3

If a spinner is divided into 4 equal sections numbered 1 to 4, what is the probability of landing on a 3?

• 1/2

• 2/4

• 1/3

• 1/4

In a lottery with 50 numbers, what is the probability of selecting the winning number?

• 1/50

• 1/25

• 1/10

• 1/100

If you draw two cards from a deck without replacement, what is the probability that both are aces?

• 1/221

• 1/44

• 1/13

• 1/52