Se connecter
Mathematics for IGCSE & O level - Ratio And Proportion (Section 1 - No. 23)
The ratio of John's age to Mary's age is 2:3. If John is 10 years old, how old is Mary?
10
15
20
25
Explication
John:Mary=2:3, 10=2*5 so Mary is 3*5 =15
Commentaires (0)
Connectez-vous pour commenter
Publicité
Autoriser javascript à charger correctement cette page
