Answer for 9,11,12,13

Answer for 9,11,12,13 the want to 48 calculators. The cost of each is out the examination 10 marks are for every correct answer s.±tracted for even wrong answer. Suh.ni answered 15 correctly 6 incorrectly What is her score? Far share an apartrnent. The balance for bins 'or the month A &scends at a rate of feet each minute. take to &scemi to a &pth feet the "'fuel

Dear Student,

Please find below the solution to the asked query:

9 ) We know Commutative Laws : We can swap numbers over and still get the same answer . As :

a $\times$ b  = b $\times$ a 

So, we can write given number , As :

6 $\times$  9 $\times$ 11  =  11 $\times$ 9  $\times$  6                                       ( Ans )

11 ) Given : Cost of a calculator  = Rs. 60.50 , So

Cost of 48 calculators  =  48 $\times$ 60.50 , So

= ( 40 + 8 ) $\times$ ( 60 + 0.50 )

Now we apply distributive property and get :

= 40 $\times$ 60 + 40 $\times$ 0.50 + 8 $\times$ 60 + 8 $\times$ 0.50

= 2400 + 20 + 480 + 4

= 2904

Therefore,

Cost of 48 calculators  =  Rs. 2904                                                 ( Ans )


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