Average Practice Test 4

Question : 37 of 40

Marks: +1, -0

The average value of the numbers 15, 21, 32, 35, 46, x, 59, 65, 72 is greater than or equal to 43 but less than or equal to 44. Then the value of x is:

42 ≤ x ≤ 51
43 ≤ x ≤ 50
42 < x ≤ 49
43 < x ≤ 50

Validate

Solution:

According to the statement,

43 ≤ {15+ 21+ 32+ 35+ 46+ x+ 59+ 65+ 72}/9 ≤ 44

43 ≤ {345+x}/9 ≤44

387 ≤ {345+x} ≤396

387-345 ≤ { x} ≤396-345

42 ≤ { x} ≤51

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