Tanvi received a large box of chocolates for Valentine's Day, and about 30% of the chocolates have a
caramel filling. Tanvi took out 2 to eat for dessert. How likely is it that at least 1 has a caramel filling?
Tanvi simulates the situation by creating a spinner with 3 white sections and 7 red sections. She spins
the spinner 2 times. Each time the spinner lands on a white section, it represents a chocolate with a
caramel filling. Tanvi records the results by writing "W" when it lands on a white section and "R" when it lands on a red
section. Here are the results of 20 trials:
RR RR RR RW RR
WR
RR
WR
RR
RW
RR
WR RR
RW RR
RW
I RW RR RR
WR
Based on Tanvi's results, what is the probability that at least 1 of the chocolates has a caramel filling?

In Tanvi's simulation, landing on a white section represents a chocolate with a caramel filling. Tanvi records 20 trials, and the spinner lands on at least 1 white section in 9 of them. So, the probability that at least 1 of the chocolates has a caramel filling is

9

20

Convert

9

20

to a percent. Write an equivalent fraction with 100 as the denominator.

9

20

=

95

205

=

45

100

Based on Tanvi's results, the probability that at least 1 of the chocolates has a caramel filling is 45%.