Question
Which of the following can be the difference between number of calls made by Reynolds on Friday and Saturday?
Answer: Option D
:
D
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:
D
The difference between number of calls made by Reynolds on Friday and Saturday = | (x-5)-(y+6) |
= |x-y-11|=|39-2y|
Because x=50-y
Now Robert made x+1 calls on Wednesday.
Therefore, x+1 ≤ 30 ≥ x≤29
y ≥ 21
Thus 21≤y≤24 gives |39-2y|=3, 5, 7 or 9
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