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Mathematics 10 Online
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?

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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