I'm having trouble with my stats homework. I didn't do statistics at a level so I'm really clueless at this.
In London in April, the probability that it rains on any particular day is 0.3. Calculate the probability that:
(i) It rains on each of the first 3 days in April. (State any assumptions you have made in order to carry out your calculation.)
(ii) It rains on the first day and is dry for the next 3 days.
Thanks in advance
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- Thread Starter
- 07-02-2016 16:07
- 07-02-2016 16:13
(remember that you multiply probabilities in an AND scenario).
ii) what's the probability of it NOT raining? Take this, and consider another AND situation where it doesn't rain on day 1, and does for three days.
Solution in spoiler (try to give it a go first though).Spoiler:ShowLet the probability that it rains = R = 0.3
Therefore the probability it doesn't rain = R' = 1 - 0.3 = 0.7
i) P = RRR = 0.33 = 0.027
ii) P = R'RRR = 0.7 x 0.33 = 0.0189
Hope I helpedLast edited by Alexion; 07-02-2016 at 16:19.