Aptitude · all questions

Probability
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Q141

Two friends A and B apply for a job in the same company. The chances of A getting selected is

\frac{2}{5}

and that of B is

\frac{4}{7}

. What is the probability that both of them get selected?

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Q142

On rolling a dice 2 times, the sum of 2 numbers that appear on the uppermost face is 8. What is the probability that the first throw of dice yields 4?

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Q143

Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is odd?

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Q144

In a school, 45% of the students play football, 30% play volleyball and 15% both. If a student is selected at random, then the probability that he plays football or volleyball is:

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Q145

Two unbiased coins are tossed. What is probability of getting at most one tail ?

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Q146

In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither blue nor green?

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Q147

Bag contain 10 black and 20 white balls, One ball is drawn at random. What is the probability that ball is white

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Q148

A box contains 3 white, 4 red and 7 blue erasers. If five erasers are taken at random then the probability that all the five are blue color is:

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Q149

Find the probability that getting 4 digit number with 1 in the unit place and 2 in the tens place when the numbers 1, 2, 3, 4 and 5 are arranged at random without repeating.

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Q150

Two dice are thrown simultaneously. What is the probability of getting the face numbers are same?

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Q151

In a throw of coin what is the probability of getting head.

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Q152

In a throw of dice what is the probability of getting number greater than 5

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Q153

A box contains 6 bottles of variety 1 drink, 3 bottles of variety 2 drink and 4 bottles of variety 3 drink. Three bottles of them are drawn at random, what is the probability that the three are not of the same variety.

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Q154

In a throw of coin what is the probability of getting tails.

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Q155

Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is at most 5?

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Q156

There are 12 boys and 8 girls in a tuition centre. If three of them scored first mark, then what is the probability that one of the three is a girl and the other two are boys?

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Q157

In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither blue nor green?

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Q158

Two dice are thrown simultaneously. What is the probability of getting the sum of the face number is at least 10?

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Q159

In a class, there are 12 boys and 16 girls. One of them is called out by an enroll number, what is the probability that the one called is a girl?

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Q160

Two unbiased coin are tossed .What is the probability of getting at most one head?

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