ew History Bockmarks People Window Help t7dep- 16598930 Tthe probability that a

Question

ew History Bockmarks People Window Help t7dep- 16598930 Tthe probability that a battery will last 10 hr or more is 0.7, and the probability that it wit lest 15 hr or more is 0.12. Given that a battery has lasted 1o hr, fin the probability that it will lest 15 hr or more. (Round your answer to three decimal places In . survey of 1000 eligible voters selected at andom, it was sound t 200 had a colege degee Add tionany, was-ond bat 90%-those who had a college degree voted in the last presidential election, whereas w% or the people wee did not have·college degree vee-in the·a pereea Assuming that the poill is representalive of all elgible voters, find the probability that an eligible voter selected at random will have the following charecteristies. (Round your answers to three decimal places.) (a) The voter had a college degree and vobed in the last presidential election b) The voter did not have a college degree and did not vobe in the last presidential election (c) The voter voted in the last presidential election, (d) The voter did not vote in the last presidential election MacBook Air 5 W E R 0

Explanation / Answer

Q1.
probability that a batter last 10 hr and more = 0.70
P(X>=10)= 0.70
probability that a batter last 15 hr and more = 0.12
P(X>=15)= 0.12

We require find P( X>=15 | X>=10 ) = P( X>=15 AND X>=10 ) / P(X>=10) = 0.12 / 0.70 = 0.171428

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