GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
The tens digit is missing from the three-digit number 8 __ 9
[#permalink]
19 Jul 2019, 02:21
19 Jul 2019, 02:21
Expert Reply
00:00
Question Stats:
75% (01:38) correct
24% (01:12) wrong based on 33 sessions
Hide Show timer Statistics
The tens digit is missing from the three-digit number 8 __ 9. If the tens digit is to be randomly selected from the ten different digits from 0 to 9, what is the probability that the resulting three-digit number will be a multiple of 9?
(A) 0.1
(B) 0.2
(C) 0.4
(D) 0.9
(E) 1
(A) 0.1
(B) 0.2
(C) 0.4
(D) 0.9
(E) 1
Re: The tens digit is missing from the three-digit number 8 __ 9
[#permalink]
19 Jul 2019, 07:58
19 Jul 2019, 07:58
Resulting three digits number will be multiple of 9. So it will be divisible by 9. Any number which will divisible by 9, sure all it's digits add up a number which is divisible by 9. As we have 10 total outcomes ( choosing a digit from 0 to 9). But only when we take 1 for ten-digit of the three-digit number, then this three-digit number is divisible by 9 (819 => adding digits, 8+1+9=18). So probability, 1/10=0.1
gmatclubot
Re: The tens digit is missing from the three-digit number 8 __ 9 [#permalink]
19 Jul 2019, 07:58
Moderators:
