Math Is Fun Forum

mathxyz

Member

From: Brooklyn, NY

Registered: 2024-02-24

Posts: 1,053

Find Percent

I know 60% of my friends like the Blue Ridge Quartet, and 45% like the Blue Ridge Quartet & like the Cathedral Quartet. What percent of those who like Blue Ridge Quartet also like Cathedral Quartet?

I think the set up goes like this:

P(Cathedral|Blue Ridge) =

P(Blue Ridge and Cathedral)
divided by P(Blue Ridge).

0.45 / 0.60 = 0.75

So, 75% of my friends who like Blue Ridge Quartet also like rhe Cathedral Quartet.

Is this right?

Keep_Relentless

Member

From: Queensland, Australia

Registered: 2024-05-05

Posts: 61

Re: Find Percent

Yes looks right.

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"The most incomprehensible thing about the world is that it is comprehensible." -Albert Einstein.

mathxyz

Member

From: Brooklyn, NY

Registered: 2024-02-24

Posts: 1,053

Re: Find Percent

Yes looks right.

Wonderful. It feels good to be right.