50 plants were planted each school out of 10 schools. After a month, the number of planets that survived are given below:Find Mean and Variance
School 1 2 3 4 5 6 7 8 9 10
Number of planet survived 40 35 32 45 35 30 45 40 35 25

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Q. In each of the 100 school, 100 plants were planted by Harit Sena. After two months, the number of plants that survived were recorded as follows.

\begin{matrix} 65, & 87, & 49, & 73, & 84, & 92, & 93, & 59, & 47, & 65, & 55, & 90, & 86, & 77, & 36, & 48, & 39, \\ 29, & 74, & 56, & 59, & 62, & 72, & 35, & 28, & 82, & 65, & 67, & 95, & 47, & 85, & 58, & 27, & 53, \\ 82, & 28, & 76, & 56, & 59, & 59, & 74, & 58, & 85, & 72, & 66, & 76, & 57, & 67, & 65, & 95, & 54, \\ 54, & 63, & 74, & 59, & 69, & 77, & 39, & 65, & 59, & 45, & 85, & 72, & 69, & 58, & 91, & 64, & 52, \\ 68, & 57, & 75, & 88, & 75, & 96, & 85, & 55, & 63, & 73, & 59, & 58, & 89, & 90, & 48, & 59, & 64, \\ 78, & 89, & 61, & 57, & 69, & 48, & 29, & 74, & 83, & 90, & 85, & 59, & 69, & 87, & 73 . \end{matrix}

Prepare a grouped frequency distribution table.

In a school, students decided to plant trees in and around the school to reduce air pollution. It was decided that the number of trees, that each section of each class will plant, will be five times of the class to which the respective section belongs. If there are 1 to 10 classes in the school and each class has three sections, find how many trees were planted by the students?

A school has 3 sections each from class 1 to 12. Students of this school plant tree in the school campus to reduce air pollution. It was decided that the number of trees, that each section of each class will plant, will be the same as the class in which they are studying. How many plants were planted by the students?

In a school, students decided to plant trees in and around the school to reduce air polution. It was decided that the number of trees, that each section of each class will plant, will be double of the class in which they are studying. If there are 1 to 12 classes in the school and each class has two sections, find how many trees were planted by the studetns.

Q. In a school, students decided to plant trees in and around the school to reduce air pollution. It was decided that the number of trees, that each section of each class will plant, will be double of the class in which they are studying. If there are

1

12

classes in the school and each class has two sections, find how many trees were planted by the students.

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School	1	2	3	4	5	6	7	8	9	10
Number of planet survived	40	35	32	45	35	30	45	40	35	25

50 plants were planted each school out of 10 schools. After a month, the number of planets that survived are given below:Find Mean and VarianceSchool 12345678910Number of planet survived 40353245353045403525

Solution:-

50 plants were planted each school out of 10 schools. After a month, the number of planets that survived are given below:Find Mean and Variance
School 1 2 3 4 5 6 7 8 9 10
Number of planet survived 40 35 32 45 35 30 45 40 35 25