A class has 20 students. If the teacher is randomly selecting a group of 3 students to represent the class on the student counci
2 answers:
Answer:
P(Sarah and her two best friends will all be chosen)=1/1140
Step-by-step explanation:
A class has 20 students.
The teacher is randomly selecting a group of 3 students to represent the class on the student council.
The number of ways of choosing 3 students out of 20=
= 1140
we have to find the probability that Sarah and her two best friends will all be chosen.
That means Sarah and her friends are one group to be chosen.
Hence, P(Sarah and her two best friends will all be chosen)=1/1140
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Answer:
Craig's collection increased by 20%.
Step-by-step explanation:
Original amount: 10
New amount: 12
To find the percent increase, we first need to find how much Craig's record collection increased by. To do this, subtract the old amount from the new amount:
12 - 10 = 2
The amount his collection increased by is 2. To find the per cent increase, divide 2 by the original amount of records:
Convert the decimal into a percentage:
0.20 * 100 = 20%
The percent increase of Craig's record collection is 20%.