- The mean height of 6 boys is 4´2´´ . The mean height ot 4 girls is 3´9´´ .The mean height of
combined 6 boys and 4 girls is
A.4´1´´ B.4´ C. 3´11´´ D.3´10´´ E. 41/2´ - For the sample 5,6,5,7,8,5,6,7,6,5 which of the following is (are) true?
- The median is 6 2. the mean is 6 3. the mode is 5.
A. 1 only B.2 only C. 3 only D. 1 and 3 only E. 1 , 2 and 3
- The median is 6 2. the mean is 6 3. the mode is 5.
- For the sample 9,8,10,9,11,9,12,12 which of the following is (are) false
A. 1:2 B. 2:3 C.3:4 D. 3:5 E. 4:5 - The ratio 27:36 , expressed as a percentage, is
A. 25% B. 45% C. 60% D. 75% E. 80%
5.The ratio 2:x , expressed as a percentage , is 40%, then x=………..
A. 3 B. 4 C.5 D. 6 E.8 - If a:b=3:8 and b:c=4:5, then a:c=…………..
A. 5:11 B. 3:8 C. 3:11 D. 3:10 E. 5:8 - If a:b=3:5 and b:c=3:5, then a:b:c=………
A. 2:3:5 B.3:5:7 C.6:10:15 D. 9:15:25 E
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