If something happens 3 times in 10, how often is it in 200 tries? These free printable worksheets turn a fractional probability into a predicted count, with every answer a whole number.
A probability is a rate, and a count is that rate applied. P(red) = 3/10 means 3 of every 10, so over 200 spins you split the tries into 20 tens and take 3 from each: 60. Saying it as “groups of ten, three from each” keeps it a multiplication a child understands rather than a formula, and it is why the trial counts are built to divide the denominator cleanly.
Why this sheet works
This is the half of probability a pad can mark. Finding P(red) itself gives a fraction, which the online keypad cannot take; multiplying it out gives a whole count of things, so this is the probability topic a child can practice on screen as well as on paper. No sheet asks for 62.5 of anything — the numbers are chosen so the answer lands whole.
How this one works
One question from this sheet, worked through a step at a time.
P(red) = 3/4. In 300 spins, how many land on red?
300÷4=75
3×75=225
3/4 means 3 out of every 4. So split the 300 into groups of 4: 300 ÷ 4 = 75.
Each group of 4 gives 3 of them, and there are 75 groups: 3 × 75 = 225.
Predict counts from probabilityProbability as a fraction
Name: Date:
Predict how many times each event happens.
1
P(red) = 3/4. In 300 spins, how many land on red?
2
P(red) = 8/10. In 120 spins, how many land on red?
3
P(a win) = 1/4. In 120 games, how many are wins?
4
P(red) = 3/4. In 120 spins, how many land on red?
5
P(red) = 1/4. In 20 spins, how many land on red?
6
P(blue) = 4/5. In 200 draws, how many are blue?
7
P(blue) = 3/5. In 40 draws, how many are blue?
8
P(a win) = 1/2. In 50 games, how many are wins?
Predict counts from probability · Probability as a fractionAnswer key
1. P(red) = 3/4. In 300 spins, how many land on red? → 2252. P(red) = 8/10. In 120 spins, how many land on red? → 963. P(a win) = 1/4. In 120 games, how many are wins? → 304. P(red) = 3/4. In 120 spins, how many land on red? → 905. P(red) = 1/4. In 20 spins, how many land on red? → 56. P(blue) = 4/5. In 200 draws, how many are blue? → 1607. P(blue) = 3/5. In 40 draws, how many are blue? → 248. P(a win) = 1/2. In 50 games, how many are wins? → 25
