Question

A box contains cards numbered from1 to 20 . Acard os drawn at random fom the box . Probability of getting prime no

Answer 1

Prime numbers between 1 to 20 are -
2, 3, 5, 7, 11, 13, 17, 19 = 8

favourable outcomes = 8

probability =
$\frac{ favourable \: outcomes}{total \: outcomes}$
$\frac{8}{20} = \frac{2}{5}$
hope it helps!☺

Answer 2

prime numb in 1 to 20

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

here Total prime number is 8

probability= 8/20= 2/5= 0.4…....ans