Mathematics, 22.10.2020 16:01 UratazZ
The mean mark of a group of 10 boys is 58. If the mean of 7 of them is 61, what is the mean of the remaining 3 boys
Answers: 2
), dimensionless, is:
(Eq. 1)
)
(Eq. 1b)
is the mark of the i-th boy, dimensionless.
(Eq. 2)
)
(Eq. 2b)
(Eq. 3)
- Mean mark of the first 7 boys, dimensionless.
- Mean mark of the remaining 3 boys, dimensionless.![\frac{1}{10}\cdot [\Sigma_{i = 1}^{7}x_{i}+\Sigma_{i=8}^{10}x_{i}] = 58](/tpl/images/0831/3175/34272.png)
![\frac{1}{10}\cdot [7\cdot (61)+3\cdot p_{3}] = 58](/tpl/images/0831/3175/e9792.png)
Another question on Mathematics
Mathematics, 21.06.2019 16:30
The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side
Answers: 1
Mathematics, 21.06.2019 17:40
Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane
Answers: 2
Mathematics, 21.06.2019 18:30
Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =
Answers: 1
Mathematics, 21.06.2019 19:00
Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 8 = -6x a. –7.12, 1.12 b. 7.12, –1.12 c. 7.12, 1.12 d. –7.12, –1.12
Answers: 2
You know the right answer?
The mean mark of a group of 10 boys is 58. If the mean of 7 of them is 61, what is the mean of the r...
Questions
Mathematics, 08.07.2021 01:30
English, 08.07.2021 01:30
Mathematics, 08.07.2021 01:30
Mathematics, 08.07.2021 01:30
Advanced Placement (AP), 08.07.2021 01:30
Mathematics, 08.07.2021 01:30
Mathematics, 08.07.2021 01:30
Mathematics, 08.07.2021 01:30
