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January 26, 2015

January 26, 2015

Posted by **Math (PLEASE HELP!)** on Wednesday, April 3, 2013 at 3:49pm.

a. Exactly 3 people will agree with that position (taken by the 35% of the population)

b. At least 3 people will agree with the position

c. At most 5 people will agree with the position

d. Fewer than 4 people will agree with the position

- math -
**Reiny**, Wednesday, April 3, 2013 at 4:41pma) prob (exactly3) = C(7,3) (.35)^3 (.65)^4

= .2679

b) at least 3 people

= 1 -(prob(none) + prob(one) + prob(two)

= 1 - ( C(7,0) .65^7 + C(7,1) (.35)(.65)^6 + C(7,2)(.35)^2 (.65)^5 )

= ..... you do the button pushing.

c) at most 5 ---- > 0,1,2,3,4,5

or exclude: 6 and 7

d) fewer than 4 ---> 0,1,2,3

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