The population of Snowtown was 4500 in 1990. In 1994, it had decreased to 3600. Find the percent decrease in population during those four years.
80%
90%
16.2%
20%
None of these
You receive a grade of 75% on a test of 60 questions. How many questions did you answer correctly?
45
8
12
50
None Of These
Sandra’s monthly salary is $3200. If a deduction for taxes from her monthly paycheck is $800, what percent of her salary goes to these deductions?
25%
25.6%
40%
4%
none of these
The cost of an article including 15% for taxes is $138.00. What is the cost of the article without taxes?
$120.00
$117.30
$20.70
$92.00
The average of the following group of numbers 43, 29, 51, 36, 33, 42, 32 is
36
33
38
43
NONE of these
Brian had marks of 80, 94, 70, 68, and 83 on five tests. His average score is between
65 and 70
70 and 75
75 and 80
80 and 85
The population of a country increased by an average of 2% per year from 2000 to 2003. If the population of this country was 2 000 000 on December 31, 2003, then the population of this country on January 1, 2000, to the nearest thousand would have been
1846
1852
1000
1500
The probability that an electronic device produced by a company does not function properly is equal to 0.1. If 10 devices are bought, then the probability, to the nearest thousandth, that 7 devices function properly is
0.057
0.478
0.001
.0
The exam scores of all 500 students were recorded and it was determined that these scores were normally distributed. If Jane's score is 0.8 standard deviation above the mean, then how many, to the nearest unit, students scored above Jane?
394
250
400
106
A school committee consists of 2 teachers and 4 students. The number of different committees that can be formed from 5 teachers and 10 students is
10
15
2100
