Posted by **Kira** on Sunday, September 25, 2011 at 8:49pm.

A baseball player has had 14 hits in 60 times at bat in the last 20 games. How many hits does the batter need in her next ten at bats to increase the probability of her getting a hit to 0.300?

- Grade 12 Data Management -
**Steve**, Tuesday, September 27, 2011 at 6:12am
The number of games is irrelevant. Starting now, we have 14/60 = .23333

Now, if she goes to bat 10 more times, and gets x hits, we want (14+x)/(60+10) = .300

14+x = .300 * 70 = 21

SO, if she hits 7/10, her avg will rise to .300

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