Mode: The class which has highest frequency.In this case, class interval 1500−2000 is the modal class.Now,Lower limit of modal class, l=1500,h=500,f1​,=40,f0​=24,f2​=33We know that,Mode =l+(2f1​−f0​−f2​f1​−f0​​)×h=1500+(2(40)−24−3340−24​)×500=1500+(80−5716​)500=1500+(2316​)×500=1500+347.826Mode =1847.83Lets take assumed mean, A as 3250.Class interval =500N=200,∑fi​ui​=−235xˉ=A+hN∑fi​ui​​=3250+200−235​×500=3250+2−1175​=2662.5Hence, the average expenditure is Rs 2662.50.