count Null expression

[Rapunzel2022]

customer	customer_type
a	11
b	12
c	13
d
e	aa
f	bb
g	cc
h	11
i	bb
j	13
k	aa

Hi,

I need your help 🙂
I have a table like this example.

Customer d has no customer type (null)

I need a view or count without Customer type 11
=count({<[customer_type]-={'11'}>}[Customer]

I need a table only without 11 like

customer	customer type
b	12
c	13
d
e	aa
f	bb
g	cc
i	bb
j	13
k	aa

When I have a diagramm the count for Customer must be 9 (including the customer with Null expression.

How can I do it?

Thanx

[hic]

=count({<customer=E({<customer_type={'11'}>})>} customer)

[Rapunzel2022]

Thanx