Students Who Have Completed a Speed Reading Course Have Reading

question 73

Multiple Choice

Students who have completed a speed reading course have reading speeds that are normally distributed with a mean of 950 words per minute and a standard deviation equal to 220 words per minute. If two students were selected at random, what is the probability that they would both read at less than 400 words per minute?

• A) 0.4938
• B) 0.0062
• C) 0.00004
• D) 0.2438

---

Definitions:

Expression

A combination of numbers, variables, operators, and sometimes parentheses that represents a value or quantity.

Decimal Notation

A way of expressing numbers that uses a decimal point to separate the whole part from the fractional part.

Expression

A combination of symbols and numbers that represent a mathematical operation or relation.

Difference

The result of subtracting one number from another, or the operation of subtraction itself.