Probability of an adult who needs correction = 82% or 0.82
So, probability of an adult who does not needs correction = 1 - 0.82 = 0.18
If 12 adults are randomly selected, the probability that at least 11 of them need correction for their eyesight is:
12C11
+ 12C12
= 12*0.11*0.18 + 1*0.09*1
= 0.238+0.09
= 0.328 or 0.33
And, yes, 11 is significantly a high number of adults requiring eyesight correction.
The slope of the line is 4/11. to find this use, m=y2-y1/x2-x1 :)
Answer:
-7+1x (ignore this I needed more characters)
Answer:
More unknown than equations, the answer cannot be determined
Step-by-step explanation:
We can solve by means of a 2x2 system of equations, we have to:
"x" is the number of children's tickets
"y" is the number of adult tickets
Thus:
blank * x + 8.75 * y = 259
x + y = 35
which means that the number of children in the group cannot be calculated with the supplied data, this is because we have 3 unknowns and there are 2 equations, which means that the system has no solution.
If we assume a value, for example, $ 5
We can solve:
5 * x + 8.75 * y = 259
x + y = 35 => x = 35 - y
replacing we have:
5 * (35 - y) + 8.75 * y = 259
175 - 5 * y + 8.75 * y = 259
- 5 * y + 8.75 * y = 259 - 175
3.75 * y = 84
y = -84 / 3.75
y = 22.4
Thus:
x = 35 - (22.4) = 12.6
there being then 22 adults and 13 children.
<span>5y^2 = 405
y^2 = 405/5
y^2 = 81
y = - 9 and y = 9
answer
</span><span>±9</span>
