- 9th
- Maths
- Probability
- Empirical Probability

Probability

Maths

Class 9

ExampleDefinitionsFormulaes

Probability that in n trials,there are r success where r-4K and k is an integer is $41 +2_{n/2+1}1 cos(4nπ )$

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Monthly income | Number of Cars | ||

(in rupees) | $1$ | $2$ | More than $2$ |

$30,001−40,000$ | $400$ | $50$ | $25$ |

$40,001−50,000$ | $100$ | $300$ | $125$ |

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(1) the number formed is an even number.

(2) the number formed is prime number.

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No. of girls in a family | $2$ | $1$ | $0$ |

No. of families | $475$ | $814$ | $211$ |

(i) $2$ girls

(ii) $1$ girl

(iii) No girl

Also check whether the sum of these probabilities is $1$.

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A coin is tossed $150$ times and the outcomes are recorded. The frequency distribution of the outcomes $H$ (i.e, head) and $T$ (i.e, tail) is given below :

Outcome | $H$ | $T$ |

Frequency | $85$ | $65$ |

Find the value of $P(H)$, i.e, probability of getting a head in a single trial.

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(i) White ball, (ii) Not a white ball?

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$4.975.055.085.035.005.065.084.985.045.075.00$

Find the probability that any of these bags chosen at random contains more than $5kg$ of flour.

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