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Q8 A teacher conducted a study where she measured the number of math riddles that students could solve in 20 minutes while listening to music Let X number of math riddles that a randomly selected student could solve while listening to music X 0 1 2 3 P X 0 05 0 34 0 41 0 20 hat is the standard deviation in the expected number of math riddles that three students could solve e listening to music 78 3425 B 5 28 4 6085 C 3 232 5 280 D 3 177 20pi 80 1 E 2010 1
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