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The average monthly expenditure of a family for the first four months is Rs. 2750, for the next three months is Rs. 2940 and for the last five months Rs. 3130. If the family saves Rs. 5330 during the whole year, find the average monthly income of the family during the year.

ARs. 3800

BRs. 3500

CRs. 3400

DRs. 4200

Answer:

C. Rs. 3400


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മൂന്നു സംഖ്യകളുടെ ശരാശരി 75 ആണ്. അവയിൽ ഏറ്റവും വലിയ സംഖ്യ 90-ഉം മറ്റു രണ്ടു സംഖ്യകൾ തമ്മിലുള്ള വ്യത്യാസം 35-ഉം ആണ്. മൂന്നിലും വെച്ചേറ്റവും ചെറിയ സംഖ്യ ഏത്?
ആദ്യത്തെ 40 ഒറ്റസംഖ്യകളുടെ ശരാശരി എത്ര?