6. Four mark example problems

1.The daily wages of a worker for \(10\) days is as follows. Find the average income of the worker.

 

Day	\(1\)	\(2\)	\(3\)	\(4\)	\(5\)	\(6\)	\(7\)	\(8\)	\(9\)	\(10\)
Wages (\(₹\))	\(250\)	\(350\)	\(100\)	\(400\)	\(150\)	\(270\)	\(450\)	\(320\)	\(610\)	\(750\)

 

 

The average income of the worker \(= ₹\)

 

2. The mean age of \(15\) teachers in a school is \(42\). The ages of the teachers are \(35\), \(42\), \(48\), \(X\), \(X + 8\), \(40\), \(43\), \(50\), \(46\), \(50\), \(37\), \(32\), \(38\), \(41\), \(40\) (in years). Find the value of \(X\) and unknown ages of the two teachers?

 

 

Value of \(X =\)

 

Ages of two teachers \(=\) 45, 5330, 3840, 48