Question No.1 – Encircle the most suitable answer.
1.
A large basket of fruit contains 3 oranges, 2 apples, and 5bananas. If a
piece of fruit is chosen at random, what is the probability of getting an
orange or a banana?
A.
4/5 B. ½ C. 7/10 D. None of the above
2. A pair of dice
is rolled. What is the probability of getting a sum of 2?
A. 1/6 B. 1/3 C. 1/36 D. None of the above
A. 1/6 B. 1/3 C. 1/36 D. None of the above
3. In a class of 30
students, there are 17 girls and 13 boys. A total of 5 students made an A grade
on their report card, three of which were girls. If a student is chosen at
random, what is the probability of getting a girl or an A student?
A. 19/30 B. 11/15 C. 17/180 D. None of the above
A. 19/30 B. 11/15 C. 17/180 D. None of the above
4. Which of the following are mutually exclusive
events when a day of the week is chosen at random?
A. Choosing a Monday or choosing a Wednesday B. Choosing a Saturday or choosing a Sunday C. Choosing a weekday or choosing a weekend day D. All of the above
A. Choosing a Monday or choosing a Wednesday B. Choosing a Saturday or choosing a Sunday C. Choosing a weekday or choosing a weekend day D. All of the above
5.
A day
of the week is chosen at random. What is the probability of choosing a Monday
or Tuesday?
A. 1/7 B. 2/14 C. 2/7 D. None of the above
A. 1/7 B. 2/14 C. 2/7 D. None of the above
6.
A jar contains 6 red
balls, 3 green balls, 5 white balls, and7 yellow balls. , what is the
probability of getting a red and a yellow ball?
A. 2/21 B.3/21 C.13/63 D. All
of the above
7.
On a math test, 5 out of
20 students got an A. If three students are chosen at random without
replacement, what is the probability that all three got an A on the test?
A. 1/114 B.25/1368 C.3/400 D. None of the above
A. 1/114 B.25/1368 C.3/400 D. None of the above
8.
Which of the following is an outcome?
A. Rolling a pair of dice B. Landing on red
A. Rolling a pair of dice B. Landing on red
C. Choosing 2 marbles from a jar D. None of the above
9. The
normal curve is also called a
10. If a distribution has a mean of 100 and a
standard deviation of 15, what value would be +2 standard deviations from the
mean?
A. 70 B.115 C.130 D. 85
Q. No 2 - A test has been devised to measure a
student's level of motivation during high school. The motivation scores on this
test are approximately normally distributed with a mean of 25 and a standard
deviation of 6.
1) What
percentage of students taking this test will have scores greater than 10?
2) John
is told that 35% of the students taking the test have higher motivation scores
than he does? What was John's score?
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