In a class of 147 students, 92 are taking math (M), 75 are taking science (S), and 51 are taking both math and science. One student is picked at random. Find the probability

P(taking math or science or both)

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!

Which situation is an example of an observational study?