The weights of 50 apples were recorded as given below- Calculate the mean weight- to the nearest gram by step deviation method- Weight in grams 80-85 85-90 90-95 95-100 100-105 105-110 110-115 No- of apples 5 8 10 12 8 4 3

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Standard X

Mathematics

Direct Method of Finding Mean

The weights o...

Question

The weights of 50 apples were recorded as given below. Calculate the mean weight, to the nearest gram by step deviation method.

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100

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Solution

The correct option is E
96

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Q. The weights of 50 apples were recorded as given below. Calculate the mean weight, to the nearest gram, by the Step deviation Method.

\begin{matrix} W e i g h t (i n g) & N o . o f a p p l e s 80 - 85 & 5 85 - 90 & 8 90 - 95 & 10 95 - 100 & 12 100 - 105 & 8 105 - 110 & 4 110 - 115 & 3 \end{matrix}

[4 MARKS]

Find the mean, variance and standard deviation using short-cut method

Height in cms	No. of children
70-75	3
75-80	4
80-85	7
85-90	7
90-95	15
95-100	9
100-105	6
105-110	6
110-115	3

Q. Weight of 60 eggs were recorded as given below:

Weight (in grams)	75−79	80−84	85−89	90−94	95−99	100−104	105−109
Number of eggs	4	9	13	17	12	3	2

Calculate their mean weight to the nearest gram.

Q. Weight of

40

eggs were recorded as given below

Weight in grams	$85 - 90$	$90 - 95$	$95 - 100$	$100 - 105$	$105 - 110$
Number of eggs	$4$	$12$	$14$	$8$	$2$

Find the modal weight.

Weight of 60 eggs were recorded as given below:
$\begin{matrix} Weight (in grams) & 75 - 79 & 80 - 84 & 85 - 89 & 90 - 94 & 95 - 99 & 100 - 104 & 105 - 109 Number of eggs & 4 & 9 & 13 & 17 & 12 & 3 & 2 \end{matrix}$
Calculate their mean weight to the nearest gram.

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The weights of 50 apples were recorded as given below. Calculate the mean weight, to the nearest gram by step deviation method.

The correct option is E 96

The correct option is E
96