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OpenStudy (anonymous):
A company that manufactures smartphones makes 70% of the phones with a touch screen and 55% of the phones with HD movie capability. 30% of the phones have both a touch screen and HD movie capability. What is the probability that a smartphone chosen at random has either a touch screen or HD movie capability?
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ganeshie8 (ganeshie8):
P(A or B) = P(A) + P(B) - P(A and B)
ganeshie8 (ganeshie8):
0.7 + 0.55 - 0.3
ganeshie8 (ganeshie8):
simplify
OpenStudy (anonymous):
ok thank you so much!
ganeshie8 (ganeshie8):
np :)
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