how many players averaged 20 points and 20 rebounds in a season

Paul Arizin had 1,121 points when grabbing 20+ boards in his rookie season in 1950-51.

Interpreted as:

How many players averaged 20 or more points and 20 or more rebounds in a season?

	NAME	PTS	REB	SEASON	TM	GP	PPG	RPG	APG	FGM	FGA	FG%	FTM	FTA	FT%	TS%	AST	PF
1	Paul Arizin P. Arizin	1,121	640	1950-51	PHI	65	17.2	9.8	2.1	5.4	13.3	40.7	6.4	8.1	79.3	51.2	138	284
2	Curly Armstrong C. Armstrong	202	89	1950-51	FTW	38	5.3	2.3	2.0	1.9	6.1	31.0	1.5	2.4	64.4	37.2	77	97
3	Cliff Barker C. Barker	152	100	1950-51	IND	56	2.7	1.8	2.1	0.9	3.6	25.2	0.9	1.4	64.9	32.2	115	98
4	Leo Barnhorst L. Barnhorst	546	296	1950-51	IND	68	8.0	4.4	3.2	3.4	9.9	34.6	1.2	1.8	68.9	37.7	218	197
5	Ed Bartels E. Bartels	72	84	1950-51	WAS	17	4.2	4.9	0.7	1.4	5.7	24.7	1.4	2.7	52.2	30.7	12	54
6	Ed Beach E. Beach	22	25	1950-51	TOT	12	1.8	2.1	0.3	0.7	3.2	21.1	0.5	0.8	66.7	26.2	3	14
7	Ralph Beard R. Beard	1,111	251	1950-51	IND	66	16.8	3.8	4.8	6.2	16.8	36.8	4.4	5.7	77.5	43.5	318	96
8	Nelson Bobb N. Bobb	148	101	1950-51	PHI	53	2.8	1.9	1.5	1.0	3.0	32.9	0.8	1.5	55.7	38.4	82	83
9	Ike Borsavage I. Borsavage	64	24	1950-51	PHI	24	2.7	1.0	0.2	1.1	3.1	35.1	0.5	0.8	66.7	39.1	4	34
10	Vince Boryla V. Boryla	982	249	1950-51	NYK	66	14.9	3.8	2.8	5.3	13.1	40.6	4.2	5.0	83.7	48.5	182	244
11	Harry Boykoff H. Boykoff	326	220	1950-51	TOT	48	6.8	4.6	1.3	2.6	7.0	37.5	1.5	2.1	74.0	42.9	60	197
12	Frankie Brian F. Brian	1,144	244	1950-51	TRI	68	16.8	3.6	3.9	5.3	16.6	32.2	6.1	7.5	82.3	42.4	266	215
13	Walt Budko W. Budko	496	452	1950-51	BAL	64	7.8	7.1	2.1	2.6	7.3	35.6	2.6	3.5	74.4	44.1	135	203
14	Art Burris A. Burris	77	106	1950-51	FTW	33	2.3	3.2	0.8	0.8	3.4	24.8	0.6	1.1	58.3	29.9	27	51
15	Tommy Byrnes T. Byrnes	217	71	1950-51	TOT	47	4.6	1.5	1.5	1.7	5.7	30.3	1.2	1.8	65.5	35.7	69	81
16	Gerry Calabrese G. Calabrese	201	65	1950-51	SYR	46	4.4	1.4	1.4	1.5	4.3	35.5	1.3	1.9	69.3	42.6	65	80
17	Bill Calhoun B. Calhoun	511	199	1950-51	ROC	66	7.7	3.0	1.5	2.7	7.7	34.6	2.4	3.5	70.6	42.1	99	87
18	Bob Carpenter B. Carpenter	323	229	1950-51	TOT	56	5.8	4.1	1.4	1.9	6.0	32.5	1.9	2.3	82.0	41.3	79	115
19	Al Cervi A. Cervi	458	152	1950-51	SYR	53	8.6	2.9	3.9	2.5	6.5	38.2	3.7	4.5	81.9	50.9	208	180
20	Cal Christensen C. Christensen	443	523	1950-51	TRI	67	6.6	7.8	2.4	2.0	6.6	30.1	2.6	3.7	71.4	40.1	161	266
21	Nathaniel Clifton N. Clifton	562	491	1950-51	NYK	65	8.6	7.6	2.5	3.2	10.1	32.2	2.2	4.0	53.2	36.4	162	269
22	Bill Closs B. Closs	570	401	1950-51	PHI	65	8.8	6.2	1.7	3.1	9.7	32.0	2.6	3.4	74.4	39.1	110	156
23	Jack Coleman J. Coleman	764	584	1950-51	ROC	67	11.4	8.7	2.9	4.7	11.2	42.1	2.0	2.6	77.9	46.3	197	193
24	Chuck Cooper C. Cooper	615	562	1950-51	BOS	66	9.3	8.5	2.6	3.1	9.1	34.4	3.0	4.0	75.3	42.8	174	219
25	Ray Corley R. Corley	122	77	1950-51	TOT	34	3.6	2.3	1.8	1.4	4.5	30.3	0.9	1.6	54.5	34.6	60	52