This question was reported to be attempted by majority of the candidates. According to the report, candidates' performance in this question was fair. Majority of them were reported not to have read from their Ogives correctly. Others did not draw the Ogive using class boundaries.
The median was 49.5 while the first quartile(Ql) was 37.8 and the third Quartile (~)59.5.
Hence, the semi-interquartile range Q₁-Q₁ = 59.5 - 32.8 = 10.85 ± 1.
                                                                                          2                     2
Number of participants who weighed at least 60kg = 25. Therefore probability of choosing a
participant who weighed at least 60kg = 25= -.1 .
                                                                       100     4