# Class 10 Maths Mcqs

Q:

A) 1 | B) 0 |

C) 0.23 | D) 0.5 |

Answer & Explanation
Answer: B) 0

Explanation: Selecting 8 blue balls from 10 green balls is an impossible event. An event that doesn’t occur in any possible scenario is called an impossible event. The probability of an impossible event is always zero.

Explanation: Selecting 8 blue balls from 10 green balls is an impossible event. An event that doesn’t occur in any possible scenario is called an impossible event. The probability of an impossible event is always zero.

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Q:

A) 0.5 | B) 0.45 |

C) 0.55 | D) 0.1 |

Answer & Explanation
Answer: C) 0.55

Explanation: The probability of occurring an event be P(E) = 0.45

The probability of not occurring the event = P(E)

P(E) + P(E) = 1

0.45 + P(E) = 1

P(E) = 0.55

Explanation: The probability of occurring an event be P(E) = 0.45

The probability of not occurring the event = P(E)

P(E) + P(E) = 1

0.45 + P(E) = 1

P(E) = 0.55

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Q:

A) Impossible event | B) Equal event |

C) Exhaustive event | D) Equally likely |

Answer & Explanation
Answer: D) Equally likely

Explanation: If two or more events have an equal chance of occurrence then that kind of an event is called an equally likely event. Here, The chance of getting a head or a tail is equal so, it is an equally likely event.

Explanation: If two or more events have an equal chance of occurrence then that kind of an event is called an equally likely event. Here, The chance of getting a head or a tail is equal so, it is an equally likely event.

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Q:

A) 0 | B) 1 |

C) 2 | D) 3 |

Answer & Explanation
Answer: B) 1

Explanation: An even that is certain to occur is called a sure event or a certain event. The probability of a sure event or a certain event is always one and it will never exceed over one.

Explanation: An even that is certain to occur is called a sure event or a certain event. The probability of a sure event or a certain event is always one and it will never exceed over one.

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Q:

A) Impossible event | B) Random event |

C) Exhaustive events | D) Mutual events |

Answer & Explanation
Answer: A) Impossible event

Explanation: An event that doesn’t occur in any possible scenario is called an impossible event. The probability of an impossible event is always zero.

Explanation: An event that doesn’t occur in any possible scenario is called an impossible event. The probability of an impossible event is always zero.

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Q:

A) 0 | B) -1 |

C) 1 | D) ? |

Answer & Explanation
Answer: C) 1

Explanation: Probability of occurring an event E = P(E)

Probability of not occurring the event E = P(E)

P(E) + P(E) = 1

Explanation: Probability of occurring an event E = P(E)

Probability of not occurring the event E = P(E)

P(E) + P(E) = 1

143

Q:

A) Euclid | B) Simon Laplace |

C) Archimedes | D) Einstein |

Answer & Explanation
Answer: B) Simon Laplace

Explanation: The definition of probability was given by Pierre Simon Laplace in the year 1795. Probability can be defined as the ratio of the number of favorable outcomes to the total number of possible outcomes.

Explanation: The definition of probability was given by Pierre Simon Laplace in the year 1795. Probability can be defined as the ratio of the number of favorable outcomes to the total number of possible outcomes.

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Q:

A) Median = L + [(n / 2 – cf) / f] * h | B) Median = L + [(n / 2 + cf) / f] * h |

C) Median = L + [(n / 2 – cf) / f] + h | D) Median = L * [(n / 2 – cf) / f] * h |

Answer & Explanation
Answer: A) Median = L + [(n / 2 – cf) / f] * h

Explanation: Formula for the Median of Grouped Data

Median = L + [(n / 2 – c.f) / f] * h

L = Lower limit of Median Class

cf = Cumulative frequency of the class prior to median class

f = Frequency of Median Class

h = Class size

n = Total frequency

Explanation: Formula for the Median of Grouped Data

Median = L + [(n / 2 – c.f) / f] * h

L = Lower limit of Median Class

cf = Cumulative frequency of the class prior to median class

f = Frequency of Median Class

h = Class size

n = Total frequency

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