The pictograph shows the number of beads of different colours in a box. The number of yellow beads is not shown.

Key: Each represents 15 beads.
Altogether, there are 510 beads in the box. How many must be drawn in the pictograph to represent the yellow beads?

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Solution

The correct option is A 7
Each represents 15 beads.
There are 510 beads in the box.
$∴$ Total number of symbols needed for representing 510 beads $= \frac{510}{15} = 34$

Number of symbols for green beads = 10
Number of symbols for red beads = 9
Number of symbols for blue beads = 8
Number of symbols present on the graph
= 10 + 9 + 8 = 27

$∴$ Number of symbols to be drawn to represent yellow beads = 34 - 27 = 7

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The pictograph shows the number of beads of different colours in a box. The number of yellow beads is not shown. Key: Each represents 15 beads. Altogether, there are 510 beads in the box. How many must be drawn in the pictograph to represent the yellow beads?

The pictograph shows the number of beads of different colours in a box. The number of yellow beads is not shown.

Key: Each represents 15 beads.
Altogether, there are 510 beads in the box. How many must be drawn in the pictograph to represent the yellow beads?