A Class Consists of 10 Males and 30 Females

question 40

Multiple Choice

A class consists of 10 males and 30 females.A random sample of n = 3 students is selected.If the first two students are both females,what is the probability that the third student is a male?

• A)10/37
• B)10/38
• C)10/40
• D)8/38

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Definitions:

2,3-Dimethylbutane

A branched chain alkane with the formula C6H14, having methyl groups at the second and third carbon atoms of the butane chain.

Compound Name

The official identification of a chemical substance based on its structural elements and molecular composition.

Heat of Combustion

The amount of heat released when a substance completely burns in oxygen, a measure of the energy content of a fuel.

Cycloalkanes

Saturated, ring-shaped hydrocarbons with the general formula CnH2n, where n is the number of carbon atoms in the ring.