2(lb + bh + hl)
A.
2(lb + bh + hl)
Find the mean of each of the following distributions :
(i)
xi |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
Total |
fi |
4 |
6 |
8 |
18 |
6 |
5 |
3 |
50 |
(ii)
xi |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
Total |
fi |
1 |
3 |
4 |
8 |
10 |
3 |
1 |
30 |
(iii)
xi |
50 |
75 |
100 |
125 |
150 |
175 |
200 |
Total |
fi |
12 |
18 |
50 |
70 |
25 |
15 |
10 |
200 |
(i)
xi |
fi |
fixi |
10 |
4 |
40 |
15 |
6 |
90 |
20 |
8 |
160 |
25 |
it |
450 |
30 |
6 |
180 |
35 |
5 |
175 |
40 |
3 |
120 |
Total |
50 |
1215 |
xi |
fi |
fixi |
12 |
1 |
12 |
13 |
3 |
39 |
14 |
4 |
56 |
15 |
8 |
120 |
16 |
10 |
160 |
17 |
3 |
51 |
18 |
1 |
18 |
Total |
30 |
456 |
(iii)
xi |
fi |
fixi |
50 |
12 |
600 |
75 |
18 |
1350 |
100 |
50 |
5000 |
125 |
70 |
8750 |
150 |
25 |
3750 |
175 |
15 |
2625 |
200 |
10 |
2000 |
Total |
200 |
24075 |
The lateral surface area of a cube of side a is
A.
4a2The lateral surface area of a cuboid of length l, breadth b and height h is
B.
2(l + b)h