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messages are conveyed by arranging 4 white, 1blue and 3red flags on a pole. flags of the same color are alike .if a message is transmitted by the order in which the colors are arranged then the total number of messages that can be transmitted if exactly six flags are used is
ans--185
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there are 5 balls ofdifferent colors and 5 boxes of colors same as those of the balls . the number of ways in which the balls ,one in each box could be placed such that at least 2 balls go to the box of its own colorsis
ans--31
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sir,i am not getting example 7,i.e.
32+0.9923=32
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i did not understand the solution posted for the question:
prove: 22225555 + 55552222 is divisible by 7.
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how to find the coordinates after reflection about a specified line? plz explain with examples.
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Sir,
I am getting example 7 of this chapter.Please con you eplain in detail.
Thank you.
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FIND THE NET FORCE ON THE CHARGE Q1 DUE TO THE OTHER THREE CHARGES AS SHOWN IN THE FIGURE. TAKE Q1= -5 μC;
Q2= -8μC
Q3=15μC
Q4= -16μC......
Hello sir,
it's easy to find the net force ..... But how to find the components of the net force!!! how to determine the angle to find the components!!!!
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please explain how to name a compound.
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Can iit-jee be cracked at this point of time when my CBSE XII board exams are approaching ? please some suggest some tips.
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two coherent sources s1 and s2 of same amplitude and wavelenth form a intensity of P at its centre another light but incoherent is used instead of the previous light and source s1 and s2 of same wavelenght and amplitude form a intensity of Q at the centre . What is the ratio of P qnd Q
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In transistor as an amplifier why there's a capacitor used
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What are the isomers of C5H10
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a ball falls from a height h and rebounds after striking the floor .if coefficient of restitution is e,find the maximum distance covered before it comes to rest .
ans--( 1+e^2)h 1-e^2
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A ball of mass m hits a floor with a speed v making an angle of inclination alpha with the normal .the coefficient of restitution is e .find the speed of the reflected ball and angle of reflection.
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a ball is projected from a flat horizontal floor vertically upward with speed v. if the coefficient of restitution for every collision between ball and floor be 'e',the ball would finally come to rest after a time
ans--2vg(1-e2)
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total numbers of integers divisible by 25 that can be formed using only the digits 0,1,2,3,4,5 taken five at a time is
ans--42
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a rectangle with sides 2m-1 and 2n-1 is divided into squares of unit length. the number of rectangle which can be formed with sides of odd length is
ans--m2n2
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sir,
The digits of a positive integer, having three digits are in A.P. and their sum is 15. The number obtained by reversing the digits is 594 less than the original number. find the number.
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what is chirality
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a car can hold two persons in front seats and one in the rear seats .if among six person only two can drive the car ,then the number of ways in which the car can be filled is
ans--40
