Re: probability | |

It is 3!(1/3)^{3} = 2/9. |

Re: probability | |

Hi Sidhartha One approach is using geometric probability excellently explained by TG in his lesson - Probability. Another basic one is - make two cases - (i) One who is arriving earlier reaches within first 50 minutes and the other one arrives in next adjacent 10 minutes. So required probability in this case comes out to be = 2*(5/6)(1/6) = 10/36. (ii) Both friends are arriving in last 10 minutes. So probility for this case = (1/6)(1/6) = 1/36. Hence total probability of meeting of two friends with given conditions becomes = 10/36 + 1/36 = |

Re: probability | |

Hi Kamal , thanks for prompt reply , i am still unable to grasp the logic for roller coaster question . If possible kindly elaborate . |