Jean bought a bag of candy that contained red candies, green candies, and brown candies. Some candies are marked with a smile an
d others are not marked. The probabilities are displayed in the table below: | Red |Green |Brown
Smile |0.100 | .300 | .10
No smile |0.200 | .150 | .15
If a random candy is chosen from this bag, what is the probability that the candy was red or had no smile?
This is an arithmetic sequence and the sum of n terms is -->
n/2(2a+(n-1)d), where a is the first term and d is the common
difference. In this case a = 10, d =6