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Edexcel IGCSE Math B 10.C grouped mean estimates

Practise grouped-mean questions by finding each midpoint, multiplying by frequency and dividing by the total frequency carefully.

Syllabus
First assessment 2018
Course
Math B 4MB1

Exam points

  • Find class midpoints from grouped intervals before estimating the total.
  • Multiply each midpoint by frequency and divide by the total number of values.
  • State the result as an estimate because grouped data uses interval midpoints.

10.C Grouped mean estimates question 1

[Maximum number: 4]

Chetan owns a fruit shop.
In January, Chetan sold 560 kg of citrus fruit.
In February, Chetan sold 518 kg of citrus fruit.

The table below shows the weight of citrus fruit, berries and tropical fruit Chetan sold in March.

Table for Question 10.C Grouped mean estimates question 1 — Edexcel IGCSE Math B

The table below gives information about the weight, in kg, of berries sold on each of the 30 days in April.

Table for Question 10.C Grouped mean estimates question 1 — Edexcel IGCSE Math B

Chetan wants to buy 60 kg of apples for his shop from US traders or French traders.
US traders: 12 kg box of apples for $29.50, free delivery, buy 4 boxes and get a 5th box free.
French traders: 1.72 euros per kg of apples, total delivery cost of 22.80 euros, special offer of 15% off the cost of apples and delivery.
Exchange rate: $1=0.92\$1=0.92 euros.

Calculate an estimate for the mean weight, in kg, of berries sold on each day in April.

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