4 गेंद या कलमो का मूल्य ₹ 12 हो तो 6 गेंद और 6 कलमो का मूल्य बताइए​

Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.