(30% of 45% + 25% of 55%)
= 3/10 × 9/20 + 1/4 × 11/20
= 27/200 + 27.5/ 200
= 54.5/2 = 27.25%
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(30% of 45% + 25% of 55%)
= 3/10 × 9/20 + 1/4 × 11/20
= 27/200 + 27.5/ 200
= 54.5/2 = 27.25%