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17 Feb 2022, 04:00
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C
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Difficulty:
65%
(hard)
Question Stats:
66% (03:26) correct
34%
(03:04)
wrong
based on 79
sessions
History
Date
Time
Result
Not Attempted Yet
Scientists studying a colony of rats exposed to carcinogens noticed that one-quarter of all of the rats had only an additional limb growing somewhere on their body, and this trait was evenly divided among male and female rats. 6 rats were found to only be missing a limb, and all of these were male. Four female rats were found to have only red eyes as a trait, while 12 males had only red eyes and an additional limb. If there were 56 rats in the colony, and all the other rats exhibited all three symptoms and there were an equal number of male and female rats with three symptoms, how many male rats were there in the colony?
A. 41
B. 38
C. 35
D. 28
E. 21
A. 41
B. 38
C. 35
D. 28
E. 21
26 Feb 2022, 12:29
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Bunuel
Total \(56 \) rats : \(\frac{1}{4} *56 = 14\) ONLY additional limb
Hence there a \(7\) males with one additional limb as the ONLY trait and \(7 \) females with one additional limb as the ONLY trait.
Additional details better explained through the table below:
Please refer to the fig. below
Attachment:
table 9.png [ 14.97 KiB | Viewed 1848 times ]
Hence total male rats \(= 35 \)
Ans C
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19 Apr 2024, 21:22
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