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```                                                                  dear sir/madam,how to solve this problem?please help.
The number of positive integral  solutions of XYZT=210 are
A)256
b)64
c)24
d)120
```
7 years ago

147 Points
```										Dear h v
factorise 210 = 7*5*3*2
XYZT =210
7 can be assign to any X,Y,Z,T in = 4 ways
similerly    5 can be assign to any X,Y,Z,T in = 4 ways
3 can be assign to any X,Y,Z,T in = 4 ways
2 can be assign to any X,Y,Z,T in = 4 ways
so total ways  = 4*4*4*4 =256

Please feel free to post as many doubts on our discussion forum as you can.If you find any question Difficult to understand - post it here and we will get youthe answer and detailed  solution very  quickly. We are all IITians and here to help you in your IIT JEE preparation.All the best. Regards,Askiitians ExpertsBadiuddin
```
7 years ago
h v
33 Points
```										thanks for the answer
```
6 years ago
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