Arithmetic Reasoning - Statistics

Jimmy earns an annual salary of $26,124. What is his average monthly salary?

$2,177

Jake’s final grade in math class is determined by the average he gets on six tests in the class. So far, Jake has earned a 97, 89, 85, 90, and 99 on the first five tests. What grade must Jake earn on the sixth test in order to get a 93 average in the class?

98

What should come next in the following sequence? 64a, 55b, 46c, 37d, 28e, ?

19f, 10g, 1h.

Terri has a jar of orange, blue, green, and red chocolate candies. In the jar are 75 orange candies, 62 blue candies, and 52 green candies. If there is a total of 252 candies in the jar, what is the probability that Terri will pick a red candy?

1/4

If there were a total of 450 raffle tickets sold and you bought 13 tickets, what's the probability that you'll win the raffle?

About 3%

Darla spent $120.37 on groceries in January, $108.45 in February, and $114.86 in March. What was the average monthly cost of Darla’s groceries?

$114.56

George bowls three games. His scores are 222, 208, and 197. What was his average score for the three games?

209

An employee works 25 hours one week, 32 hours the next week, and 15 hours the week after that. In that three-week period, how many hours did she average each week?

24

Continue the pattern: 6, 9, 13.5, 20.25, _________

30.375

There are 5 blue marbles, 4 red marbles, and 3 yellow marbles in a box. If Jim randomly selects a marble from the box, what is the probability of selecting a red or yellow marble?

7/12

Steve played in 14 basketball games. He scored a total of 53 field goals (2 points each), and 20 free throws (1 point each). What was his average score per game?

9

The first four terms in a sequence are shown below. What is the sixth term in the sequence? {3, 6, 11, 18, …}

38

In a track event with eight distinct top-ranked runners, what is the total number of possible race finish arrangements?

40,320

The sum of 7 numbers is greater than 140 and less than 210. Which of the following could be the average (arithmetic mean) of the numbers?

26

Jenny’s test grades are 93, 89, 96, and 98. If she wishes to raise her average to 95, what does she need to score on her next test?

99

Tanya’s bowling scores this week were 112, 156, 179, and 165. Last week, her average score was 140. How many points did her average improve?

13

In a manufacturing plant that produces new computers, a 0.15 probability exists that a computer will be defective. If five computers are manufactured, what’s the probability that all of them will be defective?

0.000076

Two runners finished a race in 80 seconds, another runner finished the race in 72 seconds, and the final runner finished in 68 seconds. The average of these times is ______.

75 seconds.

A three-digit code must be used to access a computer file. The first digit must be an A or a B. The second digit must be a number between 0 and 9. The final digit is a single letter from the alphabet from A to Z. How many possible access codes can there be?

520

If a hexahedral die is rolled two times, what’s the probability of NOT rolling a five both times?

25/36

A student scores 74, 87, 68, 63, and 76 on his last five exams. His teacher will drop the lowest grade to compute the student's average. What is the student's average in the class?

76.3