A Raffle Ticket Costs $5

question 44

Multiple Choice

A raffle ticket costs $5. First-prize and second-prize winners will be drawn at random. The probability of winning the $100 first prize is 1/40, and the probability of winning the $25 second prize is 1/20. What is the mean winnings for one play, taking into account the $5 cost of the ticket?

• A) −$1.25
• B) −$0.875
• C) $3.375
• D) $3.75

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Definitions:

Epidermal

Relating to the epidermis, the outermost layer of skin, which provides a barrier against environmental damage.

Afterbirth

The placenta and fetal membranes expelled from the uterus following the birth of a baby.

Placental Stage

The third and final stage of childbirth where the placenta is delivered.

Trophoblast

The outer layer of a blastocyst, providing nutrients to the embryo and developing into a large part of the placenta.