Finding Probabilities of Complementary Events Quiz

  • 7th Grade
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Quizzes Created: 7682 | Total Attempts: 9,547,133
| Questions: 20 | Updated: Dec 11, 2025
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1) Based on the experimental results, what is the experimental probability of landing on Red on the next spin?

Explanation

76 red spins out of 200 → 76 ÷ 200 = 0.38

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About This Quiz
Finding Probabilities Of Complementary Events Quiz - Quiz

In this quiz, you'll apply your knowledge of complementary events by calculating probabilities in real-world scenarios. Whether it's rolling dice, drawing marbles, or analyzing experimental data, you'll determine the probability of not getting a specific outcome, using complementary events to simplify your calculations. This quiz will help you understand how... see morecomplementary events work in experiments and how to find their probabilities.
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2) Using the experimental probability from Question 1, what is the probability of not landing on Red?

Explanation

1 − 0.38 = 0.62

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3) Using the theoretical spinner, what is P(Green)?

Explanation

Green has 2 sections out of 8 → 2/8

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4) Using the theoretical spinner, what is P(not Yellow)?

Explanation

Yellow = 1/8 → 1 − 1/8 = 7/8

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5) What is the probability of not landing on Blue?

Explanation

200 − 48 = 152 → 152/200

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6) If P(Yellow) = 54/200, what is P(not Yellow)?

Explanation

200 − 54 = 146 → 146/200

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7) Bag: 3 red, 5 blue, 2 green. Not blue = ?

Explanation

3 + 2 = 5 not blue → 5/10

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8) Die rolled once. Not 1 or 2 = ?

Explanation

4 good numbers (3,4,5,6) → 4/6 = 2/3

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9) 30% prefer soccer → not soccer =?

Explanation

100 − 30 = 70%

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10) Rain = 0.25 → no rain =?

Explanation

1 − 0.25 = 0.75

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11) P(Heads)=0.6 → P(Tails)=?

Explanation

1 − 0.6 = 0.4

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12) Numbers 1–20. Not multiple of 5 =?

Explanation

4 multiples of 5 → 20 − 4 = 16 → 16/20

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13) Chance of winning = 12% → not winning =?

Explanation

100 − 12 = 88%

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14) Homework collected = 0.9 → not collected =?

Explanation

1 − 0.9 = 0.1

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15) 10 candies: 4 cherry → not cherry =?

Explanation

10 − 4 = 6 → 6/10

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16) Spinner A,B,C,D. P(A)=1/4 → P(not A)=?

Explanation

1 − 1/4 = 3/4

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17) 50 flips: Heads 28 times → not Heads =?

Explanation

50 − 28 = 22 → 22/50

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18) Card from 52 cards → not heart =?

Explanation

13 hearts → 52 − 13 = 39 → 39/52 = 3/4

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19) Attend = 0.58 → not attend =?

Explanation

1 − 0.58 = 0.42

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20) Raffle 200 tickets, you have 5 → not win =?

Explanation

200 − 5 = 195 → 195/200

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Based on the experimental results, what is the experimental...
Using the experimental probability from Question 1, what is the...
Using the theoretical spinner, what is P(Green)?
Using the theoretical spinner, what is P(not Yellow)?
What is the probability of not landing on Blue?
If P(Yellow) = 54/200, what is P(not Yellow)?
Bag: 3 red, 5 blue, 2 green. Not blue = ?
Die rolled once. Not 1 or 2 = ?
30% prefer soccer → not soccer =?
Rain = 0.25 → no rain =?
P(Heads)=0.6 → P(Tails)=?
Numbers 1–20. Not multiple of 5 =?
Chance of winning = 12% → not winning =?
Homework collected = 0.9 → not collected =?
10 candies: 4 cherry → not cherry =?
Spinner A,B,C,D. P(A)=1/4 → P(not A)=?
50 flips: Heads 28 times → not Heads =?
Card from 52 cards → not heart =?
Attend = 0.58 → not attend =?
Raffle 200 tickets, you have 5 → not win =?
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