c. The in weight. The weight of \( 6 students \) are \( 49 kg , 52 kg , 51 kg , 58 kg \), and \( 55 kg \) respectively. Find the mean weight.
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The mean weight of 25 students of a class is 52 kg. if the mean weight of the first 13 student of the class is 48 kg and that of the last 13 students
Correct Answer - 39 kg
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There are 50 students in a class, of which 40 are boys. The average weight of the class is 44 kg and that of the grils is 40 kg. find the average weig
Correct Answer - 45 kg
2 Answers 1 views
The distributions X and Y with total number of observations 36 and 64, and mean 4 and 3 respectively are combined. What is the mean of the resulting d
Correct Answer - 3.36
2 Answers 1 views
Following is the distribution of the long jump competition in which 250 students participated. Find the median distance jumped by the students.
Distance (in m) 0 - 1 1 – 2 2 - 3 3 - 4 4 - 5 Number of Students 40 80 62 38 30 cf 40 120 182 220 250 \(\frac{n}{2}=\frac{250}{2}\) = 125 ⇒ median class is 2 - 3, l = 2, h = 1, cf =...
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In a class there are 20 boys and the remaining students are girls. The mean weights of the total 50 students is 23 kg.
Total weight of girls and boys = Mean x no. of students = 23 x 50 = 1150 Weight of boys = Mean of boys x no. of boys = 30 x 20...
2 Answers 1 views
If the mean height of 3 boys is 142 cm. and the mean height of another 7 students is 145 cm., then the mean height of 10 students.
Correct option is (B) 144.1 cm The mean height of 10 boys \(=\frac{3\times142+7\times145}{10}\) \(=\frac{426+1015}{10}\) \(=\frac{1441}{10}\) = 144.1 cm
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If the mean height of 3 boys is 142 cm. and the mean height of another 7 students is 145 cm., then the mean height of 10 students.
2 Answers
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In a senior secondary school,80 students play football or hockey.The number that play football is 5 more than twice the number that play hockey.If 15 students play both games and every student in the school plays at least one game,find (i)the number of students that play football (ii)the number of students that play football but not hockey (iii)the number of students that play hockey but not football.
I thought F or H = 80 is giving by n(F u H) = n(F) + n(H) - n(F n H)
2 Answers 8 views
The average weight of 55 students is 55 kg , and the average weight of another 45 students is 45 kg . Find the average weight of all the students .
Correct Answer - c Average = `("Sum of the quantities")/("Number of the quantities")`
2 Answers 2 views