Question 1161232
The probability of a bolt being faulty is 0.3. Find the probability that in a random sample of 20 bolts there are

</pre>a) exactly 2 faulty bolts<pre>

Under 2nd VARS on a TI-84,

binompdf(20,0.3,2)

0.0278458725

</pre>b) more than 3 faulty bolts<pre>

1 - P(less that or equal 3)

Under 2nd VARS on a TI-84,

1 - binomcdf(20,0.3,3)

1 - 0.1070868045

0.8929131955

</pre>these bolts are sold in bags of 20, Sam buys 10 bags
c) find the probability that exactly 6 of these bags contain more than 3
   faulty bolts.<pre>

The probability that 1 bag has more than 3 faulty bolts is 0.8929131955.

binompdf(10,0.8929131955,6)

0.0139964719

Edwin</pre>