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07 Jul 2021, 09:00
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E
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95% (00:54) correct
5%
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wrong
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How many of the female students in a class of 30 children received a perfect score on their last test?
(1) Of the students in the class, 10% of the students received a perfect score on their last test.
(2) Of the students in the class, 12 are female.
(1) Of the students in the class, 10% of the students received a perfect score on their last test.
(2) Of the students in the class, 12 are female.
07 Jul 2021, 09:13
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Given : Number of students = 30
(1) Of the students in the class, 10% of the students received a perfect score on their last test.
Student who got perfect score = 10% * 30 = 3 students -- we can't say how many females received perfect score , Not sufficient.
(2) Of the students in the class, 12 are female. -- Not sufficient , we still don't know females received perfect score.
Combining (1) & (2) => we still don't know out of 3 students with perfect score , how many are females.
Ans E
(1) Of the students in the class, 10% of the students received a perfect score on their last test.
Student who got perfect score = 10% * 30 = 3 students -- we can't say how many females received perfect score , Not sufficient.
(2) Of the students in the class, 12 are female. -- Not sufficient , we still don't know females received perfect score.
Combining (1) & (2) => we still don't know out of 3 students with perfect score , how many are females.
Ans E
07 Jul 2021, 10:17
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Asked: How many of the female students in a class of 30 children received a perfect score on their last test?
(1) Of the students in the class, 10% of the students received a perfect score on their last test.
NOT SUFFICIENT
(2) Of the students in the class, 12 are female.
NOT SUFFICIENT
(1) + (2)
(1) Of the students in the class, 10% of the students received a perfect score on their last test.
(2) Of the students in the class, 12 are female.
NOT SUFFICIENT
IMO E
| Perfect Score | ~Perfect Score | Total | |
| Male | |||
| Female | x=? | ||
| Total | 30 |
(1) Of the students in the class, 10% of the students received a perfect score on their last test.
| Perfect Score | ~Perfect Score | Total | |
| Male | |||
| Female | x=? | ||
| Total | 3 | 27 | 30 |
(2) Of the students in the class, 12 are female.
| Perfect Score | ~Perfect Score | Total | |
| Male | 18 | ||
| Female | x=? | 12 | |
| Total | 30 |
(1) + (2)
(1) Of the students in the class, 10% of the students received a perfect score on their last test.
(2) Of the students in the class, 12 are female.
| Perfect Score | ~Perfect Score | Total | |
| Male | 18 | ||
| Female | x=? | 12 | |
| Total | 3 | 27 | 30 |
IMO E
