Answer: The answer to the equation 4,240/8 = 530
Step-by-step explanation:
4,240 divided by 8 = 530
4,000 divided by 8 = 500
4,800 divided by 8 = 600
(For part B 500 would be an underestimate of the answer to 4,240/8 and 600 would be an overestimate of 4,240/8)
Answer:
Step-by-step explanation:
Given that a school has 20 classes: 16 with 25 students in each, three with 100 students in each, and one with 300 students for a total of 1000 students.
a) Y = no of students in the class out of 20 selected at random
Y can take values as
Y 25 100 300 Total
freq 16 3 1 20
P(Y) 16/20 3/20 1/20 1
y*p 20 15 15 50
E(Y) = 50
b) X = size of student from which one student is taken at random
X 25 100 300 Total
No of classes 16 3 1 20
Total students
(X*no of classes) 400 300 300 1000
P(x) 0.4 0.3 0.3 1
X*P 160 90 90 240
E(x) =240
c) On an average, a student at this school is in a class with 240 students. On average, a class at this school has 50 students.
i.e. expectation of number of students in a class is 50 while expectation of a student having students in the class is 240
Answer:
The vertex is (−3, −1), the domain is all real numbers, and the range is y ≤ −1
Step-by-step explanation:
f(x) = −2(x + 3)^2 − 1
The vertex form is
f(x) = a ( x-h) ^2 + k where ( h,k) is the vertex
f(x) = −2(x - -3)^2 − 1
The vertex is ( -3,-1) is the vertex
The domain is the values that x can take and x can take all real numbers
The vertex is the maximum since a is negative so the range is all values less than -1
y ≤ −1
The meal plus the tip which was pre taxed it will be $56.496
Answer:
OLUTION
GIVEN
Alex and Chris share sweets in the ratio Alex : Chris = 7 : 3.
Alex receives 20 more sweets than Chris.
TO DETERMINE
The number of sweets Chris receives.
EVALUATION
Here it is given that Alex and Chris share sweets in the ratio Alex : Chris = 7 : 3
Let Alex receives 7x sweets and Chris receives 3x sweets
Now it is given that Alex receives 20 more sweets than Chris.
So by the given condition
Hence the required number of sweets Chris receives
= 3 × 5
= 15
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Learn more from Brainly :-
1. The diagonals of two squares are in the ratio 3 : 2. Find the ratio of their areas.
brainly.in/question/33402612
2. Given that a : b:c = 75: 120 : 132
(i) simplify a : b:c,
ii) find b:a,
iii) find b:c.
brainly.in/question/19489133
creds to
pulakmath007