Question

an integer is chosen between 40 and 80. what is the probability that it is not divisible by 7

Answer 1

$<b><big>Hello Friend !!!$


$<b><big><green>Here is your answer$


$<b>Given :$


$<b>↪ An integer is chosen between 40 and 80.$


$<b>↪ The event is said to be a Favourable events when the number chosen is not divisible by 7.$


$<b>↪ Favourable events = 41, 43, 44, 45, 46, 47, 48, 50, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 78, 79.$


$<b>↪ Probability of getting a number that is not divisible by 7 = No.of Favourable events / Total no.of possibilities$


$<b>= 33 / 39$


$<b>= 11 / 13$


$<b><big>Hope It Helps$

Answer 2

Answer:

we can do it by arithmetic progression (AP) also..