Took see the census, it is Ruth Webb, 54, RG11; Piece: 1962; Folio: 56; Page: 3Stan
Looks like the "wash" was written by the original enumerator as the W is the same as for other entries on the page eg in Webb. But the W&B was written by someone else - possibly the census officials - when they processed it. If so - then perhaps the letters W&B stand for "washing and bathing" which was occupation code 063 in "Domestic Service" in the 1881 Census.
Occupations 1881, Classified Index II Domestic Class, Other Services, Order 4 Sub-order 2, 62 Washing and Bathing Service. http://www.rootschat.com/links/0t48/ Charwoman is 61Stan