Math, asked by tapanparamanik79, 5 months ago

C. Dlaci
7. There are 20 cards in a box numbered from 1 to 20. When a card is picked randomly from
the box, what is the probability that it has a number which is
a. prime number
b. factor of 15
c. multiple of 4​

Answers

Answered by ritu11sinhh
1

Answer:

a.9/20

b.1/5

c.3/20

step by step:

a) prime numbers between 1 to 20 are 1,2,3,5,7,11,13,17,19 = 9

p( prime no.) = 9/20

b) factors of 15 between 1 to 20 are 1,3,5,15 = 4

p( factor of 15) = 4/20 = 1/5

c) multiple of 4 between 1 to 20 are 4,8,12= 3

p( e ) = 3/20

please mark me as brilliant

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