So, to estimate you round to an easy number to work with. In this case, we will round to the ten for the 8, which becomes 10. We will round to the nearest 1,000 for the 6,783, which will become 7,000. Now divide 7,000÷10, the quotient is 700.
The answer is 4 3/8 boxes because 1 3/4 x 2 1/2 ＝ 4 3/8.
To answer problems like this you have to use binomial:
P (x > 1) = 1 – p (0
< x < 1) > .7
So:
1 – p (0) – p (1) >
.7
1 – (3/ 4) ^n – (3/ 4)
^n (n – 1 ) (1/ 4) > .7
Therefore n > 5.185,
and the smallest value of n so that we can satisfy the given condition is 6
(rounded up)
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