Question
How much boron concentration (mg/kg) is unsafe for plant
growth?Solution
Small amounts of boron (i.e.0.5 mg/l in irrigation water), it may become toxic to plants. Plant tolerance to boron in soils varies widely.
The average of 15 numbers is 110. The average of the first 7 numbers is 98 and the average of the last 7 numbers is 62. What is the 8th number?
The average of three numbers is 66. When three more numbers are included, the average increases by 6. Find the average of the numbers included.
In a team, there are 15 men and 25 women. The average weight of each man is 70 kg while that of each woman is 60 kg. What is the average weight of a per...
The average age of 15 children and their teacher's age are 12 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?
In an office of 35 employees, the average salary is ₹48,000. One employee earning ₹45,000 resigns, and 4 new employees with an average salary of ₹...
In a class of 50 students there are 22 girls who scored an average of 35 marks in the test. What is the average marks of the boys if the class average ...
Out of 6 numbers, the average of first 5 is 19 and last 5 is 20. If the last number is 21. Find the first number?
The average price of 10 stickers is Rs.12 while the average price of 8 of these stickers is Rs.11.75. Of the remaining two stickers, if the price of one...
The average of twelve numbers is 45.5. The average of the first four numbers is 41.5 and that of the next five numbers is 48. The 10th number...
The average salary of an employee increased by Rs.2000 when he received a bonus of Rs.58000 in his 35th year of service. Find the average salary of the ...
