Probability

[godhardonsomu]

The weight of babies at birth ranges from 3kgs to 10kgs. What is the probability that a woman whose weight is 130kgs will give birth to a baby weighing 2kgs

[bednobs]

0% given the parameters of your question

[Prudie]

Yes 0% on your figures (which are rubbish quite frankly) and lots of babies are born under 3 kgs. As for 10kgs that would hit worldwide news

[atalanta]

the probability of predictability of any pregnancy is zero.

[Peter Pedant]

some less helpful replies

3 to 10kgs ( notwithstanding the impossibility ) is a spread around (3+10)/2 kgs
so you have to decide whether 3-10 kg is normally distributed ( yes )
and whether the spread respresents one or two standard deviations

I think two

so the SD is (6.5 minus 3)/2 or 1.75

2kg is within three SD and so the chance is around 0.3% - three in a thousand

this is course work - read your course notes !

[fiction-factory]

You haven't taken the mother's weight into account though PP- have you assumed it a red herring as it may well be, or do larger mums tend to have larger babies?