Question

what is the ratio of prime numbers and composite numbers from the set of natural numbers from 1 to 20​

Answer 1

Answer:

11:10

11:10 is the ratio of prime number and composite number from the set of natural number from 1 to 20

Answer 2

Step-by-step explanation:

To Find: The ratio of prime numbers and composite numbers from the set of natural numbers from 1 to 20​.

• We know, Prime Numbers are those numbers which have only 2 factors that is, 1 and the number itself. For example: 3, 5, 7 etc.
• Prime Numbers from 1 to 20 are as follows:

        ⇒ $2,3,5,7,11,13,17,19$

• Prime numbers = 8

• Composite Numbers are those numbers which have more than 2 factors that is, factors other than 1 and the number itself. For example: 4, 9, 8 etc.

• Composite Numbers from 1 to 20 are as follows:

       ⇒ $4,6,8,9,10,12,14,15,16,18,20$

• Composite numbers = 11

• Fraction = $\frac{Prime\ numbers}{Composite\ numbers}$ = $\frac{8}{11}$

• Ratio = $8:11$

Hence, the ratio of prime numbers and composite numbers from the set of natural numbers from 1 to 2 is $8:11$.

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