  A measurement of the inclusive WW+WZ diboson production cross section in
proton-proton collisions is reported, based on events containing a leptonically
decaying W boson and exactly two jets. The data sample, collected at sqrt(s) =
7 TeV with the CMS detector at the LHC, corresponds to an integrated luminosity
of 5.0 inverse femtobarns. The measured value of the sum of the inclusive WW
and WZ cross sections is sigma(pp to WW+WZ) = 68.9 +/- 8.7 (stat.) +/- 9.7
(syst.) +/- 1.5 (lum.) pb, consistent with the standard model prediction of
65.6 +/- 2.2 pb. This is the first measurement of WW+WZ production in pp
collisions using this signature. No evidence for anomalous triple gauge
couplings is found and upper limits are set on their magnitudes.
