Try This Combinatorics Problem
Probability
Level
1
The above venn diagram shows the odd numbers and prime numbers from 1 to 10. How many odd, prime numbers are there?
2
1
4
3
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1 solution
We are interested in the intersection of "Odd" and "Prime". This gives us the elements { 3 , 5 , 7 } . Hence, there are 3 such numbers.