The quality control division evaluated reliability of a new cell phone model. In a random sampling of phones packaged and ready to ship to stores, the division found 28 did not turn on, 112 had minor software issues, and 735 had all desired functionality.

What is a reasonable probability model for the quality of the cell phones that were sent to stores?

Percent that will require fixes :

Percent that function :

Percent that wont turn on :

I mainly just need help with figuring out what to divide , is 735 the total and I put the numbers over it ??

1 answer

the total is 875

the percent that won’t turn on is 0.032, the percent that require fixes is 0.128, and the percent that function is 0.84
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