
There is one solution to this system of equations. The answer is B.
The sum of a number and 6.
Or
The sum of n and 6
Answer:
0.1611
Step-by-step explanation:
Uaing the binomial probability relation :
p = 0.5 ; q = 1 - p = 0.5
n = 10
Using the relation :
P(x = x) = nCx * p^x * q^(n-x)
P(x = 7) = 10C7 * 0.5^7 * 0.5^3
P(x = 7) = 0.1172
x = 8 ;
P(x = 8) = 10C7 * 0.5^7 * 0.5^3
P(x =8) = 0.0439
P(x = 7 or x = 8) = 0.1172 + 0.0439 = 0.1611
For some of these, a calculator is helpul.
The sum is 294903.
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This is the sum of 15 terms of a geometric sequence with first term 9 and common ratio 2. That sum is given by the formula
