# There are 20 species of fishes listed in a pond with an average of 47 fishes per species. It is found that a species listed 62 fishes is wrongly written as 22. Find the correct average.

1. 51
2. 48
3. 49
4. 50

Option 3 : 49

## Detailed Solution

Given:

Total number of species = 20

Average of fishes per species = 47

Concept used:

New average = Given average + (Difference of actual and wrongly written)/Total number of species

Calculation:

The difference between actual and wrongly written numbers = 62 – 22 = 40

Hence,

Required average = 47 + 40/20

⇒ Required average = 47 + 2 = 49

∴ The correct average of fishes is 49.
{"ft_lang_label":"__label__en","ft_lang_prob":0.9191775,"math_prob":0.9792855,"size":562,"snap":"2021-43-2021-49","text_gpt3_token_len":145,"char_repetition_ratio":0.18100359,"word_repetition_ratio":0.019607844,"special_character_ratio":0.2846975,"punctuation_ratio":0.078431375,"nsfw_num_words":0,"has_unicode_error":false,"math_prob_llama3":0.98958206,"pos_list":[0],"im_url_duplicate_count":[null],"WARC_HEADER":"{\"WARC-Type\":\"response\",\"WARC-Date\":\"2021-11-28T02:37:22Z\",\"WARC-Record-ID\":\"<urn:uuid:7c8529cc-6513-49c1-8edd-9e4b70102af2>\",\"Content-Length\":\"111338\",\"Content-Type\":\"application/http; msgtype=response\",\"WARC-Warcinfo-ID\":\"<urn:uuid:5fd2e90e-2939-497b-baf8-bbb99bc56c42>\",\"WARC-Concurrent-To\":\"<urn:uuid:ec8b2d28-188e-4fc1-b58b-7f6e57151c55>\",\"WARC-IP-Address\":\"172.67.30.170\",\"WARC-Target-URI\":\"https://testbook.com/question-answer/there-are-20-species-of-fishes-listed-in-a-pond-wi--5f8879552a7926e2fee69245\",\"WARC-Payload-Digest\":\"sha1:DWMB4N7WGOVFKJV6JU545BZBZSO4PMLF\",\"WARC-Block-Digest\":\"sha1:ZVRHWNIB6VRW25TMQS3XPQIE4R23SUMZ\",\"WARC-Identified-Payload-Type\":\"text/html\",\"warc_filename\":\"/cc_download/warc_2021/CC-MAIN-2021-49/CC-MAIN-2021-49_segments_1637964358443.87_warc_CC-MAIN-20211128013650-20211128043650-00369.warc.gz\"}"}