Saturday
March 28, 2015

Homework Help: math

Posted by anonymous on Tuesday, June 18, 2013 at 1:27am.

Jenny places 100 pennies on a table, with 30 showing heads and 70 showing tails. She chooses 40 distinct pennies uniformly at random and turns them over. That is, if a chosen penny was showing heads, she turns it to show tails; if a chosen penny was showing tails, she turns it to show heads. After this process, what is the expected number of pennies showing heads?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Math - Suppose there are 500 pennies in a row... (math problem)? The pennies are...
MATH - some pennies were on the table.erin saw that 56 were heads up and 44 were...
math - Three pennies are tossed into the air.What is the probability they will ...
math - You are going to toss 2 pennies 20 times. Make a prediction. how many ...
algebra 2 - if someone offers to pay you 1 penny on the first day, 2 pennies on ...
math - A child's coin bank contains $2.58 in pennies and nickels. If the number...
Math: Probablity - A penny, a nickel, and a dime are flipped at the same time. ...
Math-Probability - Consider a collection of n biased coins, each showing Heads ...
Math-Probability - Consider a collection of n biased coins, each showing Heads ...
Math-Probability - Consider a collection of biased coins, each showing Heads ...

Members