Two candidates P and Q contested in an election. 70% of the registered voters are P supporters. If 60% of the P supporters and 30% of the Q supporters are expected to vote for candidate P, then what percentage of the registered voters are expected to vote for candidate P?

51%

Let total voters be 1000

Then 700 are P supporters and 300 are Q supporters

 Total votes to P

= 60% of 700 + 30% of 300

= 420 + 90

= 510

Percentage of P voters

= 510 × 100/1000

= 51 %