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A flock consists of black and white sheep.
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21 Sep 2019, 08:07
21 Sep 2019, 08:07
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Question Stats:
55% (01:39) correct
45% (00:42) wrong based on 20 sessions
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A flock consists of black and white sheep. At the beginning of the year, the shepherd had 300 sheep of which 15% were black, and at the end of the year, he had 400 sheep of which 10% were black. What is the percentage of black sheep over the year (approximately)?
A)Increased by 11%
B)Decreased by 5%
C) Increased by 5%
D)Decreased by 11%
E) Did not change
A)Increased by 11%
B)Decreased by 5%
C) Increased by 5%
D)Decreased by 11%
E) Did not change
Re: A flock consists of black and white sheep.
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21 Sep 2019, 08:09
21 Sep 2019, 08:09
I understand the explanation. But the question is not clear of the needed. I thought it requires The % change overall not the black sheep change of the black sheep.
How do I don't fall in that trap again
How do I don't fall in that trap again
Re: A flock consists of black and white sheep.
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24 Sep 2019, 02:40
24 Sep 2019, 02:40
Expert Reply
\(300 \times 0.15 =45\)
\(400 \times 10 = 40\)
\(\frac{45-40}{45} \approx 11\) %
regards
\(400 \times 10 = 40\)
\(\frac{45-40}{45} \approx 11\) %
regards
