422 viewsProbability
Probability is an important part of Mathematics, in which 3 to 4 questions are asked in almost all competitive examinations. Probability can be many types of occurrence of an event by probability, the total probability of occurrence of an event is called probability of that event. To solve probability related questions, students need to have knowledge of formulas like probability = total side result / total possible result. For example, if one coin is tossed, either the head will come or the tail will come. Thus, in 2 chances, 1 head or 1 tail will come. The probability of both will be 1/2. If you too are preparing for any competition exam then here you can get important questions related to probability in various competitive exams.
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Recently Added Questions
Five dice are tossed together. What is the probability of getting different faces in all of the dice?
235 0 64f56be94687b15f94b44b4b- 1false
6!/66
- 2true
6!/65
- 3false
5!/65
- 4false
5!/66
- 5false
6!/55
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Answer : 2 6!/65
6!/65
A school has 45% girls. If 80% of girls score more than 75% marks and 70% of the boys have score more than 75% marks. If a student is selected at random and is found to have more than 75% marks, find the probability of it being a boy.
210 0 64dc7c18d02c5c746bf45d36- 177/149true
- 275/149false
- 3Cannot be determinedfalse
- 411/20false
- 59/20false
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Answer : 1 77/149
A person can hit a target 5 times out of 8 shots. If he fires 10 shots, what is the probability that he will the target twice?
517 0 64b4f3e1e154aff5337290bd- 1$${1135×3^8}\over 8^{10} $$false
- 2$${1165×3^8}\over 8^{10} $$false
- 3$${1175×3^8}\over 8^{10} $$false
- 4$${1125×3^8}\over 8^{10} $$true
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Answer : 4 $${1125×3^8}\over 8^{10} $$
A speaks the truth 5 out of 7 times and B speaks truth 8 out of 9 times. What is the probability that they contradict each other in stating the same fact?
- 1$${1\over 7}$$false
- 2$${1\over 9}$$false
- 3$${1\over 4}$$false
- 4$${1\over 3}$$true
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Answer : 4 $${1\over 3}$$
The probabilities of solving a problem by three students A, B and C are $$3\over 7$$, $$5\over 9$$ and $$1\over 5$$ respectively. The probability that problem will be solved is:
256 0 649e770dab3c5fffc2ee1c4c- 1$$155\over 315$$false
- 2$$64\over 315$$false
- 3$$251\over 315$$true
- 4$$32\over 315$$false
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