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There are 3 coins which when flipped come up heads, respectively, with probabilities 1/4, 1/2, 3/4....

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Basic Math

There are 3 coins which when flipped come up heads,respectively, with probabilities 1/4, 1/2, 3/4. One of these coinsis randomly chosen and continually flipped.

  1. (a) Find the expected number of flips until the first head.

  2. (b) Find the mean number of heads in the first 8 flips.

Answer & Explanation Solved by verified expert
4.1 Ratings (561 Votes)
Answer Let us consider the probability of p to get a head on a toss the normal number of tosses for the principal head is registered as 1p a To determine the expected number of flips    See Answer
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