Mr. Harrow has eight boys and six girls in his Honors Precalculus class. If he randomly chooses two students, one at a time, what is the probability that they are both girls?

Question

anonymous · Answer

how many total students?

anonymous · Answer

8+6 is 14

anonymous · Answer

no what is the probability that both are girls?

anonymous · Answer

right. now we are looking for the prob of picking a girl 1st.

waht do you think that prob is?

anonymous · Answer

i know its 15/91 but idk you i am supposed to get that?

anonymous · Answer

get the prob of picking a girl on the 1st try and I will take you thru it

anonymous · Answer

1/6?

anonymous · Answer

6 out of 14: first girl
5 out of 14 :second girl
then you multiply them : 6*5\(14*14)= 30\196 
simplify, it makes 15\98

anonymous · Answer

ohh thank you!

anonymous · Answer

6 girls and 14 students.
6/14=3/7
now on the next oick there are only 5 girls and only 13 students
5/13
multiply these 2 togethher to get 15/91

anonymous · Answer

ok?

anonymous · Answer

okay i get it now, i was doing 1/6 times 1/5

anonymous · Answer

great