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Sagot :
Answer:
Probability of rolling a prime or multiple of 3 = 13/20
Probability of rolling a prime = 2/5
Probability of rolling a multiple of 3 = 3/10
Step-by-step explanation:
let's list primes and multiples of 3 from 1 to 20
Primes:
2 3 5 7 11 13 17 19
Multiples of 3:
3 6 9 12 15 18
Primes OR multiples of 3
2 3 5 6 7 9 11 12 13 15 17 18 19
There's 13 of them, so the probability of rolling a prime or multiple of 3 is 13/20
Probability of rolling a multiple of 3 is 6/20 = 3/10
Probability of rolling a prime is 8/20 = 2/5
Answer:
0.6 or [tex]\frac{12}{20}[/tex] or [tex]\frac{3}{5}[/tex]
Step-by-step explanation:
Here are the multiples of 3 (that are 20 or below) :
- 3
- 6
- 9
- 12
- 15
- 18
Here are the prime numbers (that are 20 or below):
- 2
- 3
- 5
- 7
- 11
- 13
- 17
- 19
Some numbers are repeated in the two lists.
Here are all the numbers:
- 2
- 3
- 5
- 6
- 7
- 9
- 11
- 12
- 13
- 15
- 18
- 19
12 numbers are prime or a multiple of 3.
As a fraction it will be [tex]\frac{12}{20}[/tex], or simplified to [tex]\frac{3}{5}[/tex]
As a decimal it will be 0.6
I hope it helped!
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