Class
6
th
7
th
8
th
9
th
10
th
11
th
12
th
Close
Basic probability
1) Find the probability of getting at least two tails for the experiment of tossing a coin three times.
1/8
1/2
1/4
1/9
1/10
Solution
Answer:
1/2
Explanation:
If you toss a coin 3 times and each time it is possible for the coin to be H or T, we have the sample space
S = {HHH, HHT, HTH, HTT, THH, THT, TTH, TTT}
If E is the event of getting at least two tails, then we have
E = {HTT, THT, TTH, TTT}
The probability of getting at least two heads is therefore
P(E) = n(E) / n(s)
= 4 / 8
= 1 / 2
Take a break!
You have watched Screen for 30 minutes, please relax your eyes by watching any other object at 20 feet for 20 secs.
