I keep getting the wrong answer can someone tell me what we're doing wrong?

In a classroom, 1/2 of the students have brown hair. Furthermore, 2/5 have both brown hair and brown eyes. The probability that a brown-haired student also has brown eyes equals

A. 3/5
B. 4/5
C. 1/5
D. 1/2

Question

I keep getting the wrong answer can someone tell me what we're doing wrong?

In a classroom, 1/2 of the students have brown hair. Furthermore, 2/5 have both brown hair and brown eyes. The probability that a brown-haired student also has brown eyes equals

A. 3/5
B. 4/5
C. 1/5
D. 1/2

anonymous · Answer

P(brown hair)/P(brown eyes & brown hair) is this what I'm supposed to be doing, right?

anonymous · Answer

I believe you would multiply them...

anonymous · Answer

0.5*0.4=0.2
c.1/5

anonymous · Answer

I don't got a calculator and I suck at numbers but isn't that 0.2?

anonymous · Answer

Ohh yeah lol scratch that aha

anonymous · Answer

So I was dividing instead of multiplying. Thanks

anonymous · Answer

No problem :D