The average of 7 numbers is 47. If each number is decreased by 7, what will the new average be?

The average of 7 numbers is 47. If each number is decreased by 7, what will the new average be?
7 संख्याओं का औसत 47 है। यदि प्रत्येक संख्या को 7 से कम कर दिया जाए, तो नया औसत क्या होगा?