Can someone check my answer to this question please: What is the probability that out of 400 babies born 185 or fewer will be girls ? Assume that boys and girls are equally probable.: I got the answer 7.2%

Question

hockeychick23 · Answer

@satellite73 @jim_thompson5910

dtan5457 · Answer

Would it not be 46.25%? divide 185 by 400?

200/400 to be girls is already 50% so..

hockeychick23 · Answer

nope thats not 1 of the answer choices, this is how i did it:P(x ≤ 185 girls) = binomcdf(400, .5, 185) = .0735 0r 7.35%

dtan5457 · Answer

its probably easier than it looks but i dont understand it for some reason

dtan5457 · Answer

let me think..

hockeychick23 · Answer

it alright, thanks

jim_thompson5910 · Answer

I'm getting 0.0734828691927236, so that's 7.35%

hockeychick23 · Answer

yea thats what i entered as well, thanks!

jim_thompson5910 · Answer

np

jim_thompson5910 · Answer

btw I used this tool http://stattrek.com/online-calculator/binomial.aspx but your TI calculator works as well