The given data; 10,30,20
The mean will be (10+30+20)/3 = 20
Deviation from the mean will be; -10, 10, 0
Square of the deviations will be; 100, 100, 0
The sum of the square of the deviations = 200
The variance will therefore be; sum of the square of deviations from the mean divided by the N (3)
= 200/3 = 66.67
Thus; the variance = 66.67
Answer:
Kite; x = 3
Step-by-step explanation:
The quadrilateral shown is a kite.
We can first prove the 2 triangles in the kite are congruent.
Since the 3 sides of the triangle all matches with the other triangle (as the no. of strokes on the lines indicate them having the same length), and the base is a common side of both triangles, they are congruent for SSS (side, side, side).
Congruent triangles have the same interior angles.
So, we can deduce that (9x + 6)°= 11x°
(9x + 6)°= 11x°
6° = 11x° - 9x°
6° = 2x°
x° = 6/2°
x = 3
In total there are 432 student and 54+27 students that are sick and on a field trip making a total of 81 student not at school so you do 432-81= 351 students in class.
Answer:
13
Step-by-step explanation:
5 + (2 * 4)
5 + 8 = 13
Answer:
The probability that Jacob prefers to play on smartphone
Step-by-step explanation:
male is 52 whereas female is only 48, in fact, female is lower on all of them.
52% more likely for Jacob and only 48% likely for Leslie.
Sorry if wrong....