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Asia written maths
1). The average marks of 300 students is 80. If 10% of the students excluded then the average becomes 85. What is the average marks of that 10% excluded students?
2). The ratio of gold and silver in a ornament of weight 42 gram is 4:3. What amount of gold needed to make the ratio 5:3?
3). A cistern takes 10 hours to fill and 12 hours to empty due to a leak in the cistern. If the cistern is full, then how much time it will take to empty the cistern through the cistern?
4). Solve the equation: 8/2x-1 + 9/3x-1 = 7/x+1
1). The average marks of 300 students is 80. If 10% of the students excluded then the average becomes 85. What is the average marks of that 10% excluded students?
2). The ratio of gold and silver in a ornament of weight 42 gram is 4:3. What amount of gold needed to make the ratio 5:3?
3). A cistern takes 10 hours to fill and 12 hours to empty due to a leak in the cistern. If the cistern is full, then how much time it will take to empty the cistern through the cistern?
4). Solve the equation: 8/2x-1 + 9/3x-1 = 7/x+1