63 % of U.S. adults have very
63 % of U.S. adults have very little confidence in newspapers.You randomly select 10 U.S. adults. Find the probability that thenumber of U.S. adults who have very little confidence in newspapersis (a) exactly five, (b) at least six, and (c) less than four.
(a) P(5)=____ (Round to three decimal places as needed.)
(b) P(x greater than or equals 6)=_____ (Round to three decimalplaces as needed.)
(c) P(x< 4)=___ (Round to three decimal places asneeded.)
Answer:
Given: 
Therefore , the pmf of X is ,
; x=0,1,2,………..,n
= 0 ; otherwise
The table for probability is ,
| x |  |
 |
 |
|
| 0 | 1 | 1 | 4.80858E-05 | 4.80858E-05 |
| 1 | 10 | 0.63 | 0.000129962 | 0.000818759 |
| 2 | 45 | 0.3969 | 0.000351248 | 0.006273464 |
| 3 | 120 | 0.250047 | 0.000949319 | 0.028484917 |
| 4 | 210 | 0.15753 | 0.002565726 | 0.084877355 |
| 5 | 252 | 0.099244 | 0.006934396 | 0.173425082 |
| 6 | 210 | 0.062524 | 0.01874161 | 0.24607613 |
| 7 | 120 | 0.03939 | 0.050653 | 0.239425424 |
| 8 | 45 | 0.024816 | 0.1369 | 0.152876368 |
| 9 | 10 | 0.015634 | 0.37 | 0.057845112 |
| 10 | 1 | 0.009849 | 1 | 0.009849303 |
(a) 
(b)
(c)
"Our Prices Start at $11.99. As Our First Client, Use Coupon Code GET15 to claim 15% Discount This Month!!"
