Question

Numbers 1 to 20 are written on 20 separate slips ( one number on one slip), kept in a box and mixed well. One slip is chosen from the box without looking into it. What is the probability of getting a prime number? *
( a ) 9/20
( b ) 2/5
( c ) 1/2
( d ) none of these​

Answer 1

Answer:

B)2/5

Step-by-step explanation:

PRIME NO.'S BETWEEN 1 AND 2 ARE :

2,3,5,7,11,13,17,19

TOTAL PRIME NO.'S = 8

TOATAL NO.'S = 1 TO 20 = 20 NO. SLIPS

PROBABILITY = TOTAL PRIME NO.'S / TOTAL NO.'S

                     = 8/20

    ANSWER   = 2/5

MARK AS BRAINLIEST AND PLEASE FOLLOW

Answer 2

Answer:

b)2/5

Step-by-step explanation:

total number of slips=20

.°.total outcome=20

Total prime numbers between 1 to 20=8 (2,3,5,7,11,13,17,19)

favourable outcomes=8

Probability of getting a prime number=favourable outcomes/total outcomes=8/20=2/5