In a Recent Survey Of $100$ Women, the Following Information Was Gathered

question 145

Multiple Choice

In a recent survey of $100$ women, the following information was gathered: $54$ use shampoo A. $53$ use shampoo B. $31$ use shampoo C. $21$ use shampoos A and B. $17$ use shampoos A and C. $13$ use shampoos B and C. $9$ use all three. How many are not using any of the three listed shampoos (Region VIII) ? A = {women who use shampoo A } B = {women who use shampoo B } C = {women who use shampoo C } Use the figure (with Regions I to VIII) to answer the question.

• A) 17 women
• B) 21 women
• C) 4 women
• D) 9 women
• E) 13 women

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Definitions:

Sexual Isolation

A mechanism of evolutionary divergence where different species or populations can no longer interbreed due to behavioral or genetic barriers.

Gametic Isolation

A prezygotic barrier where gametes (egg and sperm) of different species are incompatible, preventing fertilization.

Mechanical Isolation

A form of reproductive barrier where differences in the size and shape of reproductive organs prevent mating between species.

Sympatric Speciation

The evolution of a new species within the same geographic region as the parental species. Compare with allopatric speciation.