Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
Ten trucks numbered 1 to 10 are carrying packets of sugar. Each packet weighs either 999 gms or 1000 gms and each truck carries only the packets of equal weights. The combined weight of 1 packet selected from the first truck, 2 packets from the second truck, 4 packets from the third and so on, upto 2 power 9 packets from the 10th truck is 1022870 gms. The trucks which have the lighter bags are: a) 1.3.5 b)2,4,5 c) 1,9 d)2,8
Ten trucks numbered 1 to 10 are carrying packets of sugar. Each packet weighs either 999 gms or 1000 gms and each truck carries only the packets of equal weights. The combined weight of 1 packet selected from the first truck, 2 packets from the second truck, 4 packets from the third and so on, upto 2 power 9 packets from the 10th truck is 1022870 gms. The trucks which have the lighter bags are:
a) 1.3.5 b)2,4,5 c) 1,9 d)2,8
Calculate 1+2+2^2+.......2^9 which is 1023.
If at all , all the packets are of 1000gms thetotal weights be 1023000.
But the given weight is 1022870gms.
So we replace the difference between them that is 1023000-1022870=130 by replacing 1000 gms packets with 999gm packets.
So just see the option on whose replacement gives a difference of 1130.
That is option no. (d)2,8.
becoz 2(1000)+2^7(1000)-2(999)-2^7(999)=130
1023000-2(1000)+2^7(1000)-2(999)-2^7(999)=1023000-130=1022870.
MANU
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !