1. a group of 12 people enjoy different hobbies, 2 enjoy art, 6 enjoy knitting and 4 enjoy quilting. a person is chosen at random.
what is the probability that the person enjoys knitting or quilting?
2/3
1/2
5/6
1/3
2. adam has 10 coins in his pocket. he has 2 nickels, 3 quarters, 2 dimes and 3 pennies. adam chooses a coin at random.
what is the probability that he selects a nickel or a dime from his pocket?
2/5
3/5
4/5
1/2
3. jamie rolls a pair of six-sided number cubes.
what is the probability that the sum of the numbers on the number cubes is either a multiple of 5 or an odd number?
5/9
25/36
7/12
2/3
4. in a group of 30 people, 9 people study french and 14 people study spanish. seven people study both french and spanish.
what is the probability of studying french or spanish?
7/50
7/30
23/30
8/15
5. a and b are two events.
p(a)=0.5 , p(b)=0.4 and p(a and b)=0.3 .
what is the value of p(a or b) ?
0.2
0.3
0.4
0.6