Tina puts the letters of the word RADAR on pieces of paper and puts them in a bag. What is the probability she will draw an R twice?
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OpenStudy (bloomlocke367):
@rational
OpenStudy (rational):
is that the complete question ?
OpenStudy (bloomlocke367):
yes
OpenStudy (rational):
it doesnt specify how many times the experiment was conducted hmm
OpenStudy (bloomlocke367):
is it 2/5 plus 2/5?
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OpenStudy (rational):
question is not clear enough
OpenStudy (bloomlocke367):
oops, I so left out two sentences XD sorry
OpenStudy (bloomlocke367):
Tina puts the letters of the word RADAR on pieces of paper and puts them in a bag. She draws two letters without looking. The first piece of paper is replaced before the second one is drawn. What is the probability she will draw an R twice?
OpenStudy (bloomlocke367):
sorry. XD
OpenStudy (rational):
there are a total of 5 letters and 2 R's
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OpenStudy (bloomlocke367):
yes...
OpenStudy (bloomlocke367):
and you do it twice. so is it 2/5 + 2/5?
OpenStudy (rational):
you need to multiply
OpenStudy (rational):
2/5 * 2/5
OpenStudy (bloomlocke367):
oh, okay, I didn't know if it was multiplication or addition.
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