AC Lim's answer to Kaushik's Primary 6 Maths Algebra Singapore question.
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Average balloons became 65 after 2 boys join in.
Average balloon for 2 boy = 2×65 =130
The different from total 2 boys sold to average = 165-130=35
The average for all boys and girls different = 65-60=5
Number of girls for the group = 35÷5 =7 girls.
Average balloon for 2 boy = 2×65 =130
The different from total 2 boys sold to average = 165-130=35
The average for all boys and girls different = 65-60=5
Number of girls for the group = 35÷5 =7 girls.
Date Posted:
4 years ago
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