Question 1023644
<pre>
This is a binomial probability problem.

The probability that in N trials, there will be
exactly x succesful outcomes, if the probability
of a success in 1 trial is p, is given by the
formula

{{{NCx*p^x*(1-p)^(N-x)}}}

We seek the probability that in 4 trials, there 
will be exactly 4 succesful outcomes (girls), 
given that the probability of a success (girl) 
in 1 trial is 0.48,

{{{4C3*(0.48)^3*(1-0.48)^(4-3)}}}

{{{4*(0.110592)*(0.52)^1}}}

{{{4*(0.110592)*(0.52)}}}

{{{0.23003136}}}

Round to 0.23, write as {{{23/100}}}

Or do it on a TI-83 or 84 calculator.

2ND, VARS, ALPHA, MATH

If you get a screen with trials, p:, x value, Paste, 
make it read 

trials:4
p:0.48
x value:3
Paste

Highlight Paste

Press ENTER

Read:     binompdf(4,0.48,
          3)

Or if you get binompdf( make it read like that

Press ENTER

Read .23003136

Edwin</pre>