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SRE-231<br />
22.<br />
( ) ( )<br />
( ) ( )<br />
( ) ( )<br />
1<br />
23.<br />
( ) ( )<br />
( ) ( )<br />
1<br />
( ) ( )<br />
Graph of reflection on x = 1 ) 1<br />
Graph reflection on y = – 2 1<br />
Writing in the matrices form<br />
P Q R<br />
1<br />
* + * +<br />
(iii)<br />
* +<br />
* +<br />
1<br />
1<br />
* +<br />
The co-ordinates of the images are (11,7), (7,-6)and (9,8)<br />
1<br />
24.<br />
10<br />
20<br />
30<br />
40<br />
50<br />
2<br />
3<br />
4<br />
5<br />
6<br />
c. f<br />
2<br />
30<br />
5<br />
20<br />
9<br />
10<br />
14<br />
0<br />
20<br />
10<br />
60<br />
60<br />
40<br />
0<br />
60<br />
1<br />
∑<br />
∑<br />
∑<br />
Place of median = (<br />
Calculation of ∑<br />
Mean deviation = ∑<br />
) th item<br />
=( ) th item<br />
= 10.5 th item<br />
Median (Md) = 40<br />
= = 11<br />
1<br />
1<br />
1<br />
7
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