Page 93 - NUMINO Challenge_D2
P. 93
Type 10 -2 Probability of Simultaneous Events
The probability of a rainy day after a rainy day is 1 , and the probability
of a rainy day after a sunny day is 4
1 If it rained
3 .
on Wednesday, find the probability of having a rainy day on Friday.
1 Use the probability of a rainy day after a rainy day to find the probability
of a sunny day after a rainy day.
2 If a is the probability of event A and b is the probability of event B, the
probability of events A and B occurring simultaneously is a b. In the case
above, there is a probability of rain or no rain on Thursday. Complete the
following table to find the probability of each case. (Mark as raining and
as not raining.)
Day Wednesday Thursday Friday
Outcome 1 1 1
44
Outcome 2
3 Find the probability of having a rainy day on Friday from 2 .
90 NUMINO Challenge D2
The probability of a rainy day after a rainy day is 1 , and the probability
of a rainy day after a sunny day is 4
1 If it rained
3 .
on Wednesday, find the probability of having a rainy day on Friday.
1 Use the probability of a rainy day after a rainy day to find the probability
of a sunny day after a rainy day.
2 If a is the probability of event A and b is the probability of event B, the
probability of events A and B occurring simultaneously is a b. In the case
above, there is a probability of rain or no rain on Thursday. Complete the
following table to find the probability of each case. (Mark as raining and
as not raining.)
Day Wednesday Thursday Friday
Outcome 1 1 1
44
Outcome 2
3 Find the probability of having a rainy day on Friday from 2 .
90 NUMINO Challenge D2
