The A.M of the following distribution is 47. Determine the value of P

Classes 0-20 20-40 40-60 60-80 80-100

Frequency 8 15 20 P 5

What does A.M mean? dont calculate the answer just tell me the meaning of A.M

arithmetic mean is the mean of the data, which is calculated be .

where f is the frequency of the interval and x is the mid-point of the interval.

CI | x (mid-point of CI) | f | fx |

0-20 | 10 | 8 | 180 |

20-40 | 30 | 15 | 450 |

40-60 | 50 | 20 | 1000 |

60-80 | 70 | p | 70p |

80-100 | 90 | 5 | 450 |

p+48 |

given: arithmetic mean = 47.

therefore

thus the value of p is 94.60.

hope this helps you.

cheers!!

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