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?
A) 5
B) 6
C) 7
D) 8
Correct Answer: C
Solution :
Each
represents 15 beads. There are 510 beads in the box. \[\therefore \] Number of symbols \[=\frac{510}{15}=34\] Number of symbols present on the graph =10+9+8=27 \[\therefore \]Number of symbols to be drawn to represent yellow beads \[\text{= 34 - 27 = 7}\]
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