Probability and relative frequency: medium

	$9^{th}$ ‍	$10^{th}$ ‍	$11^{th}$ ‍	$12^{th}$ ‍	Row total
Plays an instrument	$7$ ‍	$3$ ‍	$5$ ‍	$9$ ‍	$24$ ‍
Does not play an instrument	$14$ ‍	$22$ ‍	$17$ ‍	$9$ ‍	$62$ ‍
Column total	$21$ ‍	$25$ ‍	$22$ ‍	$18$ ‍	$86$ ‍

Eddie will enter high school next year. His older brother tells him that everybody in high school plays a musical instrument. Skeptical, Eddie decides to investigate. Throughout the next month, he asks a randomly selected sample of high-school students whether they play an instrument. The table shows what Eddie finds. Rounded to the nearest tenth of a percent, what percentage of all students that play an instrument are in

10^{th}

grade?

(Ignore the

%

symbol when entering your answer. For example, if the answer is

12.4 %

, enter

12.4

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How do I enter a student-produced response on the SAT?

For student-produced response questions, solve each problem and enter your answer as described below.

If you find more than one correct answer, enter only one answer.
You can enter up to 5 characters for a positive answer and up to 6 characters (including the negative sign) for a negative answer.
If your answer is a fraction that doesn’t fit in the provided space, enter the decimal equivalent.
If your answer is a decimal that doesn’t fit in the provided space, enter it by truncating or rounding at the fourth digit.
If your answer is a mixed number (such as $3 \frac{1}{2}$ ‍), enter it as an improper fraction ( $\frac{7}{2}$ ‍) or its decimal equivalent ( $3.5$ ‍).
Don’t enter symbols such as a percent sign, comma, or dollar sign.

Examples:

Answer	Acceptable ways to enter answer	Unacceptable: will NOT receive credit
$3.5$ ‍	$3.5$ ‍ , $3.50$ ‍ , $\frac{7}{2}$ ‍	$\frac{31}{2}$ ‍ , $3$ ‍ $\frac{1}{2}$ ‍
$\frac{2}{3}$ ‍	$\frac{2}{3}$ ‍ , $.6666$ ‍ , $.6667$ ‍ , $0.666$ ‍ , $0.667$ ‍	$0.66$ ‍ , $.66$ ‍ , $0.67$ ‍ , $.67$ ‍
$- \frac{1}{3}$ ‍	$- \frac{1}{3}$ ‍ , $- .3333$ ‍ , $- 0.333$ ‍	$- .33$ ‍ , $- 0.33$ ‍

Digital SAT Math

Course: Digital SAT Math > Unit 7

Problem