I'll get you started:
mean = np = (500)(.56) = ?
standard deviation = √npq = √(500)(.56)(.44) = ?
Note: q = 1 - p
Finish the calculations.
To find z-score:
z = (x - mean)/sd
Note: x = 250
Once you have the z-score, look in a z-table using the score to find your probability. Remember that the question is asking "at least 250" when looking at the table.
Answer:
Daniel (now) is 3 years old, (2 years ago) is 1 year old.
Kevin (now) is 6 years old, (2 years ago) is 4 years old.
Step-by-step explanation:
Now:
-Kevin: k = d + 3
-Daniel: d
2 years ago:
-Kevin: k - 2 = 4(d - 2)
-Daniel: d - 2
We have the equation:
(k - 2) + 2 = k
4(d - 2) + 2 = d + 3
4d - 8 + 2 = d + 3
3d - 6 = 3
3d = 9
d = 3
k = d + 3 = 3 + 3 = 6
Each of the oranges would sell for 50 cents so 10*0.50=5 dollars
And for the grapefruit each cost 80 cents so 11*0.80=8.80
So in total he would spend 13 dollars and 80 cents.
0.09121×1000=<span>91
</span><span>if you have 21 bins then the 'middle bin' is bin 11 (starting at 1)
</span>
<span>So the 'mean' of this distribution is 11.
</span>
<span>Therefore from 1000 balls the number of balls is 0.91 x 1000.
</span>
So therefore the answer would be C
The slope of the red line = 2
The y-intercept of the red line = 3
The x-intercept of the red line = -1.5
