Helen measures the lengths of 150 fish of a certain species in a large pond. These lengths, correct to the nearest centimetre, are summarised in the following table. $$$40 \%$$$ of these fish have a length of $$$d \mathrm{~cm}$$$ or more. Use your graph to estimate the value of $$$d$$$. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................

Mathematics

IGCSE&ALevel

CAIE

Exam No：9709_m20_qp_52 Year：2020 Question No：7(b)

Answer:

$60 \%$ of $150=90$
Approx. $16.5[\mathrm{~cm}]$

Knowledge points:

5.1.4 use a cumulative frequency graph (e.g. to estimate medians, quartiles, percentiles, the proportion of a distribution above (or below) a given value, or between two values.)

Answer:

Knowledge points:

Solution:

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