Each three – digit numbers is written in a paper slip and put in a box. If one slip is drawn form it, what is the probability of its being a multiple of 9 which ends in 5?
(1) 1 / 9
(2) 1 / 18
(3) 1 / 90
(4) 1 / 100
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Each three – digit numbers is written in a paper slip and put in a box. If one slip is drawn form it, what is the probability of its being a multiple of 9 which ends in 5?
(1) 1 / 9
(2) 1 / 18
(3) 1 / 90
(4) 1 / 100
Each three – digit numbers is written in a paper slip and put in a box. If one slip is drawn form it, what is the probability of its being a multiple of 9 which ends in 5?
(1) 1 / 9
(2) 1 / 18
(3) 1 / 90
(4) 1 / 100
(3) 1 / 90
Multiple of ends in s mean add multiple of 45
a = 135 , d = 90 ; an = 945
945 = 135 + (n -1) d; d = 90
⇒ n = 10
∴ Probability = 10/900 = 1/90