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In school X, 30 students study English or Russian or both. If 10 of th

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Joined: 11 Jun 2018
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In school X, 30 students study English or Russian or both. If 10 of th  [#permalink]

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New post 30 Jul 2018, 09:07
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69% (01:40) correct 31% (02:26) wrong based on 29 sessions

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In school X, 30 students study English or Russian or both. If 10 of these students do not study English, how many of these students study both English and Russian?


(1) Of the 30 students, 6 do not study Russian.

(2) A total of 24 students study Russian.
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Joined: 18 Jun 2018
Posts: 190
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Re: In school X, 30 students study English or Russian or both. If 10 of th  [#permalink]

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New post 30 Jul 2018, 09:40
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dawncheadle wrote:
In school X, 30 students study English or Russian or both. If 10 of these students do not study English, how many of these students study both English and Russian?


(1) Of the 30 students, 6 do not study Russian.

(2) A total of 24 students study Russian.


OA:D
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Re: In school X, 30 students study English or Russian or both. If 10 of th  [#permalink]

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New post 30 Jul 2018, 11:37
1
dawncheadle wrote:
In school X, 30 students study English or Russian or both. If 10 of these students do not study English, how many of these students study both English and Russian?


(1) Of the 30 students, 6 do not study Russian.

(2) A total of 24 students study Russian.



You can do it through Venn diagram..

Total 30 and 10 do not study E
1) 6 do not study R
So B =30-10-6=14
Sufficient
2) 24 study R
So B+R=24......B+10=24.......B=14
Sufficient

D
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Re: In school X, 30 students study English or Russian or both. If 10 of th &nbs [#permalink] 30 Jul 2018, 11:37
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