Question

m 1 to 80 with one number written on each card are put
d thoroughly. A card is drawn at random from the box,
bability that the number written on it is:
Cards numbered from 1 to 80 with
in a box and mixed thoroughly. A
what is the probability that the numbe
(1) multiple of 10
(11) less than 15​

Answer 1

given,

there are cards numbered 1 to 80

1)sol: the numbers which are multiples of 10 are 10,20,30,40,50,60,70,80

So,

there are 8 favourable outcomes

probability =8/80

final answer of probability =1/10

2)sol:the numbers which are less than 15 are from

1 to 14

So,

there are 14 favourable outcomes

probability =14/80

final answer of probability =7/40

I hope you understand this