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Probability

Multiple Choice Questions

91. Ten cards numbered 1, 2, 10 are put in a box. If a card is drawn at random, then the probability that the card drawn is a prime number is:

$space 7 over 10$
$3 over 5$
$2 over 5$
$2 over 5$

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92. An experiment has two outcomes E and F. P(E) + P(F) is equal to:

86 Views

93. In a survey, out of all students, 15% said ‘no’, 57% said ‘yes’ and the remaining said ‘They could not decide’. If a student is chosen at random, what is the chance that the student did not say ‘yes’?

113 Views

94.

When a coin is tossed 500 times, the following outcomes were recorded:
Head: 270 times, Tail: 230 times
If now a coin is tossed, the probability of getting a Head is

$27 over 50$
$23 over 50$
1
1

262 Views

95.

A coin is tossed 500 times with the following frequencies:
Head: 235, Tail = 265
The coin is tossed once again, the probability of getting a Tail is

0.50
0.47
0.45
0.45

317 Views

96. Sum of probabilities of all events of a trial is :
less than 1
greater than 1
lies between 0 and 1
lies between 0 and 1

lies between 0 and 1

100 Views

97.

A dice is tossed 100 times. The frequency of occurrence of numbers 1,2,3,4,5,6 are given as under:
1 : 22, 2:28, 3: 12, 4: 14, 5: 11,6: 13
A die is tossed again. The probability of an odd prime number is

0.23
0.50
0.49
0.49

106 Views

98. 11 bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg) 4.97, 5.05, 5.08, 5.03, 5.00, 5.06, 4.98, 5.04, 5.08, 5.07, 5.00. The probability that a bag chosen at random, contains more than 5 kg of flour is:

$space space 2 over 11$
$4 over 11$
$9 over 11$
$9 over 11$

87 Views

99.

A coin is tossed 1000 times with the following frequencies:
Head: 460, Tail: 540
The coin is tossed again once. The probability of getting a tail is

$27 over 100$
$27 over 50$
$23 over 50$
$23 over 50$

116 Views

100. Two coins are tossed ‘x’ number of times simultaneously. If the probability of having one head is 0.55, where it occurs 275 times, then the value of x is: