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Probability Worksheets - Page 31

Probability Worksheets
  • Page 31
 301.  
If a box contains more number of violet balls than pink balls, then it is ______ likely to pick a pink ball.
a.
more
b.
equally
c.
less
d.
I don′t know.


Answer: (c)


Correct answer : (3)
 302.  
There were 8 gold, 5 copper, and 13 silver coins in a box. Sam picked a coin, recorded the result, and put the coin back into the box. He did this 15 times in all. Which coin he would have picked the most?
a.
Silver
b.
Copper
c.
Gold
d.
None of the above


Answer: (a)


Correct answer : (1)
 303.  
Tim has 70% chance of winning the car race. What is the probability of Tim not winning the race?
a.
0.45
b.
0.55
c.
0.65
d.
0.3


Solution:

P(not winning) = 1 - P(winning)

Probability of Tim winning the car race = 70 / 100

P(not winning) = 1 - 70 / 100 = 30 / 100 = 0.3
[Substitute and simplify.]

Probability of Tim not winning the car race is 0.3.


Correct answer : (4)

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