1. In a five-match test series, the runs scored by the two opening batsmen were as given...

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1. In a five-match test series, the runs scored by the two opening batsmen were as given in Table 10.3. Calculate the mean score over the series for each batsman.

Player A 50 140 0 38 130 60 21 55 0 138 Player B 70 30 56 68 61 58 48 86 52 72 Table 10.3 Scores for two

2. The grouped data of Table 10.4 represents the percentage marks scored by 66 candidates in an examination. Calculate the mean percentage mark.

class intervals % marks 10-19 20-29 30-39 40-49 50-59 60-69 70-79 80-89 90-99 TOTAL Frequency fi 2 6 11 9 14

3. The heights of a sample of 20 plants were measured to the nearest millimetre. The results were as given in Table 10.5.

Height (mm) 0-14 15-24 25-34 35-44 45-54 55-64 65-74 75-84 85-94 95-104 TOTAL Frequency 0 1 0 3 1 5 4 4 1 1

Calculate the mean height.

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