Page 195 - Start Up Mathematics_5

Example 3: The average lifespan of some mammals is given below. Read the pictograph
and answer the following questions.

Lifespan of mammals Scale
= 5 years
horse
= 3 years
goat

dog

cat

giraffe

(a) Which two pairs of mammals have equal lifespans?
(b) Which mammal has the largest lifespan?

(c) What is the lifespan of a giraffe?

Solution: (a) Goat and dog have equal lifespans = (2 × 5) + 3 = 13 years
(b) Horse has the largest lifespan = (5 × 5) + 3 = 28 years

(c) Lifespan of a giraffe = 5 × 5 = 25 years

Example 4: At a dessert shop, a bowl of custard costs ` 25, a scoop of ice cream costs ` 20,
a brownie costs ` 30 and a slice of pancake costs ` 20. Choosing a suitable
symbol, represent this data by a pictograph.

Solution: Cost of desserts Scale
= ` 5
bowl of custard

scoop of ice cream

brownie

slice of pancake

Tally chart

Raw data can also be represented by using tally charts about which you have already learnt
in the previous classes. Let’s review it with an example.

Example 5: Kanika bought 10 chocolates, 8 packets of biscuits, 3 bottles of juice, 4 packets
of fruit cake and 12 toffees. Represent this data by a tally chart.

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