[Proba] Can't specify two constraingts when solving.

[M4xi1m3]

Describe the bug

Take for example the normal distribution. In an exercise I had P(0 < X < a) = 2/11 and had to solve for a. I wasn't able to specify both the 0 and the 2/11.

To Reproduce

Steps to reproduce the behavior:

1. Go to the 'Probability' app
2. Select Normal distribution then press Next
3. Select the second way of calculating 'P(a < X < b) = c'
4. Try to set both the 0 and 2/11.

Expected behavior

I would expect to be able to set both the value. Here, setting the 2/11 after the 0 removes the 0 and centers the area under the curve.

Environment

• Epsilon version 13.1.0
• The platform(s) on which the problem happens: all.

[suazhero]

Hum, supposed to be done as is by a calculator? Or you just wish you could :) ? A workaround would be P(X<0) + P(0<X<a) + P(X>a) = 1 giving P(X>a) = 1 - 0.5 - 2/11 = 7/22 (supposing X ~ N(0, 1)) which gives you a. Which i believe would be the way to achieve this with any other calculator that only offers NormalBcd. Returning the result as is without any details would probably be rejected? Unless Multiple Choice without justification... But maybe could be added

[schreibeLehmann]

Expected behavior

I would expect to be able to set both the value.

So would i expect. I'd like to see this feature in the future:)