Question

numbers 1 to 20 are written on slips of papers and put in a box . a slip is to be drawn ft m it write the probability of prime​

Answer 1

Answer:

2/5

Step-by-step explanation:

Prime nos. between 1 and 20 are 2,3,5,7,11,13,17,19.

P(Prime)=No. of primes/Total no. of probabilities

             =8/20

             =2/5

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Answer 2

Answer:

Step-by-step explanation:

S={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}

n(S)=20

A={2,3,5,7,11,13,17,19}

n(A)=8

Therefore P=n(A)/n(S)=8/20=2/5