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# Daphnia is a type of water flea commonly found in lakes.

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Senior Manager
Joined: 13 Jan 2018
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Daphnia is a type of water flea commonly found in lakes.  [#permalink]

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18 Oct 2018, 05:41
1
1
00:00

Difficulty:

25% (medium)

Question Stats:

77% (01:13) correct 23% (01:38) wrong based on 49 sessions

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Daphnia is a type of water flea commonly found in lakes. Females can reproduce asexually, and they will either produce a male or female embryo depending on the stress level of their environment. If in a stressful environment a female has a 75% chance to reproduce asexually and the odds of a male being born are 2:1 then what is the probability that a female in this environment will asexually produce a male?

0.5
0.6
0.7
1.0
None of the above

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Re: Daphnia is a type of water flea commonly found in lakes.  [#permalink]

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18 Oct 2018, 20:17
1
eswarchethu135 wrote:
Daphnia is a type of water flea commonly found in lakes. Females can reproduce asexually, and they will either produce a male or female embryo depending on the stress level of their environment. If in a stressful environment a female has a 75% chance to reproduce asexually and the odds of a male being born are 2:1 then what is the probability that a female in this environment will asexually produce a male?

0.5
0.6
0.7
1.0
None of the above

in a stressful environment a female has a 75% chance to reproduce asexually - so $$\frac{3}{4}$$ and
the odds of a male being born are 2:1, so $$\frac{2}{3}$$

the probability that a female in this environment will asexually produce a male = $$\frac{3}{4}*\frac{2}{3}=\frac{1}{2}$$=0.5

A
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Re: Daphnia is a type of water flea commonly found in lakes.   [#permalink] 18 Oct 2018, 20:17
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