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16 Jun 2023, 09:37
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
67% (01:36) correct
33%
(01:33)
wrong
based on 73
sessions
History
Date
Time
Result
Not Attempted Yet
The table below reflects the scores of five students across five Mathematics tests.
What is the average score of the five students across the five Mathematics tests?
(1) Test 2 accounts for 22.00 % of total marks secured by Natalie.
(2) Test 3 accounts for 15.29 % of total marks secured by the 5 students.
| Student | Test 1 | Test 2 | Test 3 | Test 4 | Test 5 |
| Sam | 76 | 72 | 81 | 81 | 80 |
| Tim | 80 | X | 75 | 80 | 85 |
| Darren | 90 | 95 | 95 | 100 | 100 |
| Julia | 100 | 99 | 98 | 96 | 97 |
| Natalie | 84 | 88 | Y | 83 | 89 |
What is the average score of the five students across the five Mathematics tests?
(1) Test 2 accounts for 22.00 % of total marks secured by Natalie.
(2) Test 3 accounts for 15.29 % of total marks secured by the 5 students.
16 Jun 2023, 12:56
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Dhruv0911
Statement 1
(1) Test 2 accounts for 22.00 % of total marks secured by Natalie.
While the statement can help us obtain the value of Y, the statement is not sufficient as it doesn't help us find the value of X.
We need the values of both X and Y to find the required average score. Eliminate A and D.
Statement 2
(2) Test 3 accounts for 15.29 % of total marks secured by the 5 students.
We have two unknown variables. This statement will not help get a unique value of X and Y. The statement is not sufficient.
Eliminate B
Combined
We can use the value of Y from statement 1 to solve statement 2.
Hence, the statement combined can help find the average.
Option C
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