Probabilities of mutually exclusive events
Probabilities of mutually exclusive events.
- Probability = favourable outcomes ÷ all outcomes when individual outcomes are equally likely.
- A probability lies between 0 and 1; complementary probabilities sum to 1.
- Experimental relative frequency estimates probability and can vary between samples.
Example 1
A bag contains 2 red, 3 blue and 4 green counters. One counter is selected. Find the probability of red or blue.
Example 2
A bag contains 3 red, 3 blue and 5 green counters. One counter is selected. Find the probability of red or blue.
Your turn
A bag contains 4 red, 3 blue and 6 green counters. One counter is selected. Find the probability of red or blue.
Check answer
A bag contains 5 red, 3 blue and 7 green counters. One counter is selected. Find the probability of red or blue.
Check answer
A bag contains 2 red, 4 blue and 8 green counters. One counter is selected. Find the probability of red or blue.
Check answer
A bag contains 3 red, 4 blue and 4 green counters. One counter is selected. Find the probability of red or blue.
Check answer
A bag contains 4 red, 4 blue and 5 green counters. One counter is selected. Find the probability of red or blue.
Check answer
A bag contains 4 red, 3 blue and 6 green counters. One counter is selected. Find the probability of red or blue.
AnswerA bag contains 5 red, 3 blue and 7 green counters. One counter is selected. Find the probability of red or blue.
AnswerA bag contains 2 red, 4 blue and 8 green counters. One counter is selected. Find the probability of red or blue.
AnswerA bag contains 3 red, 4 blue and 4 green counters. One counter is selected. Find the probability of red or blue.
AnswerA bag contains 4 red, 4 blue and 5 green counters. One counter is selected. Find the probability of red or blue.
Answer